PDA

View Full Version : Most Requested Table Tennis Review Ever | Rakza 7



Dan
01-08-2021, 02:36 PM
Hey everyone!

We have released a lot of equipment reviews over the years but one that pops up often in the comments and requests is Yasaka Rakza 7. So here it is, our most requested table tennis review ever!


https://www.youtube.com/watch?v=YGMwwIOHe2k

Richie
01-08-2021, 03:06 PM
Great review Dan!

I used Rakza 7 for 3 years on the BH and agree with what you said. What I didn't like with rakza 7 compared to other rubbers like mantra H which I use now, is that it isn't very grippy, sometimes I even felt like the ball was slipping off of the rubber, maybe that was after a lot of usage though. I really felt like it wasn't good for thin contacts. So I had to hit into the sponge more to get spin. Maybe this is why it's in a way more controllable as the spin generation comes more from hitting into the sponge than the topsheet. And the sponge isn't that hard and not that soft either, good balance.

Archyan
01-08-2021, 05:01 PM
I don't think I've seen Dan hit that many backhands in a row before!
Nonetheless, great review!

flash
01-08-2021, 09:14 PM
When I re-tired and got back in TT I was trying out a lot of different rubbers, but it seemed like I always ended going back to the Rakza 7, it had enough speed and spin for me and it seemed like more of my balls where landing on the table. I would say if Tenergy 05 is to much for any one to use they should try the Rakza 7.

Ray
01-09-2021, 10:06 PM
Another useful review, thanks.

Rakza 7 came out years ago, way back in the 40mm celluloid ball era. So, this is the most requested review since you hesitated some 10 years to test it.:o I suppose you have tested R7 with plastic balls, therefore you feel it "lacks spin", especially in comparison with modern tacky rubbers. However, its downside can be somewhat compensated easily with a proper blade.

BTW, did you mention the blade you were using during the test?

R7 is a classic and still one of the bestsellers for a reason.

yogi_bear
01-09-2021, 10:29 PM
Rakza 7 is really good and like the Vega Series rubbers, it is still a good rubber for polyballs but with lesser spin due to ball change.

Lazer
01-10-2021, 02:30 AM
Great review Dan!

I used Rakza 7 for 3 years on the BH and agree with what you said. What I didn't like with rakza 7 compared to other rubbers like mantra H which I use now, is that it isn't very grippy, sometimes I even felt like the ball was slipping off of the rubber, maybe that was after a lot of usage though. I really felt like it wasn't good for thin contacts. So I had to hit into the sponge more to get spin. Maybe this is why it's in a way more controllable as the spin generation comes more from hitting into the sponge than the topsheet. And the sponge isn't that hard and not that soft either, good balance.

I haven’t tried Mantra H, but with Mantra M I find exactly the opposite. To get good spin you need to hit harder. I like spin on my soft strikes too. I also find it more lifeless.
You’ll need to find something else because the Mantra range has been discontinued.

cheers
L-zr

Richie
01-10-2021, 12:04 PM
I haven’t tried Mantra H, but with Mantra M I find exactly the opposite. To get good spin you need to hit harder. I like spin on my soft strikes too. I also find it more lifeless.
You’ll need to find something else because the Mantra range has been discontinued.

cheers
L-zr

If by generating spin you mean by hitting into the sponge, then yes I agree you need to hit harder to get more spin and speed. But on thin contacts the ball doesn't go into the sponge much and the topsheet has good grip, so for that I think it has good spin and better spin than Rakza 7 for me. Mantra H I bet is even more lifeless because of the hardness than M, but I like that for serve return.

Lazer
01-10-2021, 01:40 PM
With generating spin I mean simply to rotate the ball, the way it’s done is secondary.
My experience is that Mantra M requires a hard hit. Mantra M is harder than Rakza 7 this is probably the reason because both have about equal friction (I like to recall). Anyway I get much better spin with Rakza 7.
I like to get spin on loose hits and I don’t like sticky rubbers. This means I need a soft rubber with high friction. This is reflected by my setup.

cheers
L-zr

brokenball
01-10-2021, 04:36 PM
Rubbers don't have control. The player does.
People are not calibrated machines. The way to review a rubber is like how Pathfinderpro did years ago.

I wonder how Dan measures grip. I think he means coefficient of friction.
I would like to see them Dan and Tom a match. One with Rakza 7 and the other with their favorite super rubber. Then switch. The reason why is that each rally starts out relatively slow. For the most part they are just blasting balls back and forth. What would each player think they were giving up and would their perceived increase in control make up for it.

I don't like the comment about lifting backspin. Lifting back spin can be done with any normal rubber and SP.
The key is the match the tangential ( rotational surface ) speed of the ball. The ball will go back with the same amount of spin if you do this. If you swing faster you can close the paddle a little and increase the spin but you must swing faster than the surface speed of the ball to do this.

What it all comes down to is normal and tangential coefficient of restitution and whether you like the feel of the rubber. The relative coefficients of restitution could be measured. A TT ball can be shot at the rubber to measure the rebound. How far it bounces is an indication of the normal coefficient of restitution. If the ball has spin then the angle of the bounce off the paddle is an indication of the tangential coefficient of restitution.

I don't like reviews. There is too much opinion in all those except where there are measurements done like in Pathfinderpro's videos but that requires a lot of work.
What is also missing from these reviews is that can I do with this rubber that I can't with the other rubber.

Where I agree with Dan is the price/performance ratio. I buy my Rakza 7 from Tabletennis11 where I get 4 for the price of 3.

Lazer
01-10-2021, 05:04 PM
I love the reviews. Without them I wouldn’t know dudely sqwat and I have to test myself and step on all the mines...
It would be better if the manufacturers hade a universal way to document.
Anybody can understand that a review is subjective, but it’s much better than nothing...

When it comes to control, it is an inverse of speed (almost) at best, so maybe it would be better to express it by stating that it is your opinion (which is really obvious anyway).

Btw I think Dan makes some the best reviews, if not the best.

cheers
L-zr

Dipak1974
01-10-2021, 05:52 PM
Rakza 7 is really good and like the Vega Series rubbers, it is still a good rubber for polyballs but with lesser spin due to ball change.

How does it compare to Rozena? My lad is using Rozena both sides and does get on really well with them but I’m curious how Rakza 7 compares to Rozena.

Lazer
01-10-2021, 06:03 PM
How does it compare to Rozena? My lad is using Rozena both sides and does get on really well with them but I’m curious how Rakza 7 compares to Rozena.

I can tell you that.
Rakza 7 any day of the week, easier to get spin, similar speed, similar control.

cheers
L-zr

brokenball
01-10-2021, 10:36 PM
It would be better if the manufacturers hade a universal way to document.
L-zr
They will NEVER do it. It would take the BS out of the marketing. People would realize the new rubbers aren't any better than the old rubbers.

I repeat. what is missing from the subjective reviews is what one rubber can do that other rubbers can't or not easily. There is no force or impulse and resulting trajectory that T05 can generate than Rakza 7 cannot. It may require a different stroke.

yogi_bear
01-11-2021, 01:21 AM
How does it compare to Rozena? My lad is using Rozena both sides and does get on really well with them but I’m curious how Rakza 7 compares to Rozena.
Rozena is bouncier. For the spin, Rozena offers a bit more.

zentt
01-11-2021, 09:42 AM
With generating spin I mean simply to rotate the ball, the way it’s done is secondary.
My experience is that Mantra M requires a hard hit. Mantra M is harder than Rakza 7 this is probably the reason because both have about equal friction (I like to recall). Anyway I get much better spin with Rakza 7.
I like to get spin on loose hits and I don’t like sticky rubbers. This means I need a soft rubber with high friction. This is reflected by my setup.
cheers
L-zr

I was using Mantra M on BH and recently went back to Rakza 7 (normal version, not soft) and found like Lazer did with the soft version that it was considerably easier to generate spin with, particularly for me with serves and hard pushes. I am waiting to try the Tmount Ace 2 Gold Sponge rubber on BH as, as much as I like the normal Rakza 7, it still feels a bit too soft and a touch slow for me. I am interested that Yogi says that Rozena is spinnier and bouncier than R7 - maybe I will try that on BH sometime - I wonder if Rozena is harder than R7 normal?.
ATB....

Lazer
01-12-2021, 10:19 AM
I was using Mantra M on BH and recently went back to Rakza 7 (normal version, not soft) and found like Lazer did with the soft version that it was considerably easier to generate spin with, particularly for me with serves and hard pushes. I am waiting to try the Tmount Ace 2 Gold Sponge rubber on BH as, as much as I like the normal Rakza 7, it still feels a bit too soft and a touch slow for me. I am interested that Yogi says that Rozena is spinnier and bouncier than R7 - maybe I will try that on BH sometime - I wonder if Rozena is harder than R7 normal?.
ATB....

I believe it is harder, and I beleive it has marginally more speed.

Cheers
L-zr

yoass
01-12-2021, 12:02 PM
I can tell you that.
Rakza 7 any day of the week, easier to get spin, similar speed, similar control.

cheers
L-zr

I'm sorry, but I disagree. I like both - but would prefer Rozena to R7. A larger power and spin envelope, without sacrificing much if anything.

Dan
02-06-2021, 07:59 AM
Great review Dan!

I used Rakza 7 for 3 years on the BH and agree with what you said. What I didn't like with rakza 7 compared to other rubbers like mantra H which I use now, is that it isn't very grippy, sometimes I even felt like the ball was slipping off of the rubber, maybe that was after a lot of usage though. I really felt like it wasn't good for thin contacts. So I had to hit into the sponge more to get spin. Maybe this is why it's in a way more controllable as the spin generation comes more from hitting into the sponge than the topsheet. And the sponge isn't that hard and not that soft either, good balance.

Hey Richie, thanks! Yeah I preferred the Rakza 7 on the backhand side, really controlled and you feel like you can accelerate hard whilst keeping high levels of consistency. On the forehand side I felt it did lack that zip and purchase on the ball, and in the serves actually.

We will be trying the Razka Z soon, looking forward to seeing how that compares.

Another useful review, thanks.

Rakza 7 came out years ago, way back in the 40mm celluloid ball era. So, this is the most requested review since you hesitated some 10 years to test it.:o I suppose you have tested R7 with plastic balls, therefore you feel it "lacks spin", especially in comparison with modern tacky rubbers. However, its downside can be somewhat compensated easily with a proper blade.

BTW, did you mention the blade you were using during the test?

R7 is a classic and still one of the bestsellers for a reason.

Thanks Ray. Good point it's been out for a very long time and will have had a good effect on the celluloid ball. Looking forward to trying Rakza 9 and Z.

I used the Boll ALC blade and Tom used the Hybrid Wood from Stiga. What blade did you use?

Lazer;334481 I love the reviews. Without them I wouldn’t know dudely sqwat and I have to test myself and step on all the mines...
It would be better if the manufacturers hade a universal way to document.
Anybody can understand that a review is subjective, but it’s much better than nothing...

When it comes to control, it is an inverse of speed (almost) at best, so maybe it would be better to express it by stating that it is your opinion (which is really obvious anyway).

Btw I think Dan makes some the best reviews, if not the best.

cheers
L-zr
Thanks for your nice comments L-zr 💪🏓 I agree if there was a way for manufactures to universally document stats that would be really useful and cool! I just try to say best how I feel about the product and also comparing blade/rubbers now in the TTD ratings has helped think where there product sits.

IB66
02-06-2021, 03:23 PM
Hey Richie, thanks! Yeah I preferred the Rakza 7 on the backhand side, really controlled and you feel like you can accelerate hard whilst keeping high levels of consistency. On the forehand side I felt it did lack that zip and purchase on the ball, and in the serves actually.

We will be trying the Razka Z soon, looking forward to seeing how that compares.


Thanks Ray. Good point it's been out for a very long time and will have had a good effect on the celluloid ball. Looking forward to trying Rakza 9 and Z.

I used the Boll ALC blade and Tom used the Hybrid Wood from Stiga. What blade did you use?

Thanks for your nice comments L-zr 💪🏓 I agree if there was a way for manufactures to universally document stats that would be really useful and cool! I just try to say best how I feel about the product and also comparing blade/rubbers now in the TTD ratings has helped think where there product sits.
Hi Dan,

Looking forward to the Rakza Z review!! Bring it on !! One of my favourite rubbers!!

thomas.pong
02-09-2021, 04:14 PM
How does it compare to Rozena? My lad is using Rozena both sides and does get on really well with them but I’m curious how Rakza 7 compares to Rozena.
To me, Rakza 7 offers more speed and spin than Rozena, which is softer, a bit bouncy, but more controllable and predictable.

thomas.pong
02-09-2021, 04:21 PM
Hey everyone!

We have released a lot of equipment reviews over the years but one that pops up often in the comments and requests is Yasaka Rakza 7. So here it is, our most requested table tennis review ever!


https://www.youtube.com/watch?v=YGMwwIOHe2k
Glad you guys finally reviewed Rakza 7! One of my favorite rubbers of all-time.

Great balance of speed, spin and control as well as price-performance ratio.

I do think that it is spinnier and grippier than you give it credit for, more like an 8, when MX-P should be rated the same as T05 at 9.

The only down point I have with R7 is its weight which is 50+g cut.

Konrad Bak
02-09-2021, 11:17 PM
deleted

The Pong Professor
02-10-2021, 04:39 AM
brokenball;334476Rubbers don't have control. The player does.
People are not calibrated machines. The way to review a rubber is like how Pathfinderpro did years ago.

I wonder how Dan measures grip. I think he means coefficient of friction.
I would like to see them Dan and Tom a match. One with Rakza 7 and the other with their favorite super rubber. Then switch. The reason why is that each rally starts out relatively slow. For the most part they are just blasting balls back and forth. What would each player think they were giving up and would their perceived increase in control make up for it.

I don't like the comment about lifting backspin. Lifting back spin can be done with any normal rubber and SP.
The key is the match the tangential ( rotational surface ) speed of the ball. The ball will go back with the same amount of spin if you do this. If you swing faster you can close the paddle a little and increase the spin but you must swing faster than the surface speed of the ball to do this.

What it all comes down to is normal and tangential coefficient of restitution and whether you like the feel of the rubber. The relative coefficients of restitution could be measured. A TT ball can be shot at the rubber to measure the rebound. How far it bounces is an indication of the normal coefficient of restitution. If the ball has spin then the angle of the bounce off the paddle is an indication of the tangential coefficient of restitution.

I don't like reviews. There is too much opinion in all those except where there are measurements done like in Pathfinderpro's videos but that requires a lot of work.
What is also missing from these reviews is that can I do with this rubber that I can't with the other rubber.

Where I agree with Dan is the price/performance ratio. I buy my Rakza 7 from Tabletennis11 where I get 4 for the price of 3.
As a scientist, I would also prefer to measure/quantify characteristics of rubbers and blades. There are clearly some ways that could be done, BUT it would require expensive technical equipment plus a lot of time spent.

In the end, who will pay for that? As it is, none of us who review equipment are getting rich of it, especially considering the amount of time that goes into writing and/or making video reviews. Experienced players/reviewers CAN qualitatively describe how the equipment feels to them and communicate the experimental observations (e.g., length of trajectory, amount of spin based on how opponent reacts, soft/sharp feeling, etc). Is this approach scientific? No. Is it biased? I am sure we all try to be as objective as possible. Is it helpful? I think it is.

virtuososiu
03-04-2021, 10:22 AM
Hi everyone, I have a question about how-to pair this rubber.

Previously I have used Rakza 7 on a 5 ply limbe topped blade, and it was very good. It encouraged me to complete my stroke and encouraged me to hit hard with it.

However I tried to put this on Carbonado 45, and I just couldnt feelt he grip anymore. It felt like it just penerated the rubber/sponge, rebounced by the blade, and then shot out without gripping and spinning the ball. Is it because carbonado 45 is relatively stiff and hard compare to a 5 ply limba topped blade? Or is it the rubber is relatively soft and it just doesnt work as well on a carbon blade?

Is it also related to the notion (in Dan's review) that there isn't as much grip and/or "purchase" on this rubber

virtuososiu
03-04-2021, 09:33 PM
Rakza 7 is really good and like the Vega Series rubbers, it is still a good rubber for polyballs but with lesser spin due to ball change.
Hi Yogi bear, just wondering if you can share how-to pair Rakza 7.

I really liked it on 5 ply wood blade, but not so much on the carbonado 45.

yogi_bear
03-05-2021, 12:17 AM
Hi Yogi bear, just wondering if you can share how-to pair Rakza 7.

I really liked it on 5 ply wood blade, but not so much on the carbonado 45.
MA Lin Soft Carbon, Falck W7, Ma Lin Extra Offensive

brokenball
03-05-2021, 04:33 AM
As a scientist, I would also prefer to measure/quantify characteristics of rubbers and blades. There are clearly some ways that could be done, BUT it would require expensive technical equipment plus a lot of time spent.

Once a standardize testing setup is made it wouldn't take too much time to test a rubber. The main things to test are the normal and tangential COR. That wouldn't take long.

[quoute]
In the end, who will pay for that? As it is, none of us who review equipment are getting rich of it, especially considering the amount of time that goes into writing and/or making video reviews. Experienced players/reviewers CAN qualitatively describe how the equipment feels to them and communicate the experimental observations (e.g., length of trajectory, amount of spin based on how opponent reacts, soft/sharp feeling, etc). Is this approach scientific? No.
[/quote]
That is the problem. People aren't calibrated. I am an expert at motion control. Over 35+ years I know that people think they see things that really are wrong. It takes a high speed camera and other data acquisition devices to know what is really happening.
I don't trust people's opinions. I trust measured facts.

I have the equipment to test TT blades, rubbers and balls.



Is it biased? I am sure we all try to be as objective as possible. Is it helpful? I think it is.
I don't do product reviews because I am not a calibrated machine.
I do have opinions. I know what I like and what works for me.
Again, I don't trust people's opinions. I only trust what I can measure.

I regard all the TT manufacturers as fraudulent scam artists and too many people are suckers. I know at times I have fallen into that category. Too many believe the equipment will help them. It won't. Practice, technique and ability are the key.

I am 67 now and play for the exercise. There has been no league play for a year now. I find Rakza 7 to be a good compromise between cost and any supposed magic.

yogi_bear
03-05-2021, 07:55 AM
As a scientist, I would also prefer to measure/quantify characteristics of rubbers and blades. There are clearly some ways that could be done, BUT it would require expensive technical equipment plus a lot of time spent.

In the end, who will pay for that? As it is, none of us who review equipment are getting rich of it, especially considering the amount of time that goes into writing and/or making video reviews. Experienced players/reviewers CAN qualitatively describe how the equipment feels to them and communicate the experimental observations (e.g., length of trajectory, amount of spin based on how opponent reacts, soft/sharp feeling, etc). Is this approach scientific? No. Is it biased? I am sure we all try to be as objective as possible. Is it helpful? I think it is.
I think you would agree with me that being too technical will not enable normal readers to relate to a post.

thomas.pong
03-05-2021, 08:54 AM
Once a standardize testing setup is made it wouldn't take too much time to test a rubber. The main things to test are the normal and tangential COR. That wouldn't take long.

[quoute]
In the end, who will pay for that? As it is, none of us who review equipment are getting rich of it, especially considering the amount of time that goes into writing and/or making video reviews. Experienced players/reviewers CAN qualitatively describe how the equipment feels to them and communicate the experimental observations (e.g., length of trajectory, amount of spin based on how opponent reacts, soft/sharp feeling, etc). Is this approach scientific? No.


Since you have the know-how, the testing equipment and it wouldn't take long, it would be great and very valuable if you would test rubbers and blades scientifically and publish your findings!

Similar to what TTGear Lab does with his graphs but more in-depth.

thomas.pong
03-05-2021, 09:27 AM
Hi everyone, I have a question about how-to pair this rubber.

Previously I have used Rakza 7 on a 5 ply limbe topped blade, and it was very good. It encouraged me to complete my stroke and encouraged me to hit hard with it.

However I tried to put this on Carbonado 45, and I just couldnt feelt he grip anymore. It felt like it just penerated the rubber/sponge, rebounced by the blade, and then shot out without gripping and spinning the ball. Is it because carbonado 45 is relatively stiff and hard compare to a 5 ply limba topped blade? Or is it the rubber is relatively soft and it just doesnt work as well on a carbon blade?

Is it also related to the notion (in Dan's review) that there isn't as much grip and/or "purchase" on this rubber
I've used Rakza 7 on several blades, Viscaria, Innerforce AL, Korbel, Virtuoso, Harimoto ALC, Primorac OFF-, Hadraw VK, Acoustic, and it felt great on both FH and BH on all of them.

I haven't tried the Carbonado 45, but I know it's a particular blade in that it's a low/soft carbon-type, which can be a bit muted, so maybe that has something to do with it. But it could likely be more based on the bellow:

Based on your impressions, it seems like to you, Rakza 7 feels relatively soft, whereas I find it relatively hard (both are legit). In the same fashion, it seems like you find Carbonado 45 to be stiff, whereas I would probably find it to be soft and flexible. Personally, I prefer a hard rubber on a soft and flexible blade, so I likely wouldn't want a rubber I perceived to be soft on a blade I perceived to be stiff. I know for others, it's the other way around.