Dead polys - how to avoid trampoline effect?

kailash

Professional
After 6 to 8 hours, strings become like a trampoline, rocket launcher. Using polys in Pure Aero at 52 pounds; once at 55 pounds.

Haven't tried Kirchbaum yet.

What will help to avoid this? Increase the tension? Pre stretching? Use strings with better tension maintenance or multi at higher tensions?
 

esgee48

G.O.A.T.
Use pre-stretched polyester strings in 16 Ga min. Buying them factory stretch is better than trying to stretch on your own. The pre-stretch removes a lot of the static tension losses. The strings are generally stiffer, muted and lose tension like a SG. You still have to use lower tensions.
 

Muppet

Legend
Apply a lubricant. I like coconut oil. It doesn't take much of it for it to be effective. If the strings are able to slide against each other, they will not lock up and fall into a pocket or trampoline situation. Also the added snap back is evidence of a spinny string bed.
 

Hmgraphite1

Hall of Fame
So poly to me reaches a point where it doesn't stretch, zero elasticity. At this point the strings feel harsh and are extremely low power. So we need to swing harder to get the ball deep. The ball flies cause were swinging harder. Is this trampoline? It's not what I've noticed
 

weelie

Semi-Pro
I have not noticed a trampoline effect in poly, like in most other strings. Rather, they go harsh and dead, ...and maybe give less spin? (Instead of poly, I am currently mainly playing Crossfire ZX hybrid (first time), which has some trampoline from the get go, feeling comfortable but lacking a tad on control at the tension I have them (pre-streched of course), and they will go loose at some point, let's see how long that takes.)
 

kailash

Professional
So poly to me reaches a point where it doesn't stretch, zero elasticity. At this point the strings feel harsh and are extremely low power. So we need to swing harder to get the ball deep. The ball flies cause were swinging harder. Is this trampoline? It's not what I've noticed
I have noticed that in my other racquets. That is not the trampoline effect. I had MSV focus hex in 18×20 racquet for 9 months or so and it neither became harsh nor trampoline!

I am guessing that the initial tension was low in this racquet or i need to go for pre-stretching plus maybe with a thicker gauge as others suggested.
 

J D

Rookie
IME, some polys continue to drop tension and trampoline more while others go dead and/or lock up, losing power. I found the ideal situation for me was to use a hybrid with one of each. With the right combo, they can offset each other's aging issues pretty effectively.

I ended up with ALU Power Spin in the mains and regular ALU Power Silver in the crosses in my PA. Although the feel did change over time, playability, power, and trampolining were really pretty consistent until the texture wore off the mains. I did have to string it on the tighter side (#56) for control because the PA pattern is so open. A similar, cheaper combo is Tour Bite or HyperG mains with Pro Line II crosses.

If I were still using the PA, I would also definitely try Kirschbaum MP Rough 17 in the mains and regular MP 17 in the crosses. MP are prestretched strings that offer a firm but not harsh feel with minimal trampolining, good spin, and great control. For me, MP retains its playability longer than any other poly I've tried except for Head Hawk, and I've tried a lot.

Just be aware that MP is a very heavy string and will add 4-6 points to the swingweight compared to most other similar gauge polys. If it's an issue, you can always use MP 18, which offers a little softer feel and more spin without sacrificing much control or string life.
 

Dartagnan64

G.O.A.T.
I think tension loss causes trampolining but loss of elasticity and resilience is the cause of "dead" polys. All string beds lose tension, even gut, which may lead to the string bed deflecting more and producing the trampoline. But "deadness" is a quality unique to polyester (yay plastic!) where there suddenly is no give anymore.

Low tension thin polys are more likely to give you a trampoline, thicker pre-stretched stiff polys go dead and produce that harsh unforgiving feel.
 

kailash

Professional
IME, some polys continue to drop tension and trampoline more while others go dead and/or lock up, losing power. I found the ideal situation for me was to use a hybrid with one of each. With the right combo, they can offset each other's aging issues pretty effectively.

I ended up with ALU Power Spin in the mains and regular ALU Power Silver in the crosses in my PA. Although the feel did change over time, playability, power, and trampolining were really pretty consistent until the texture wore off the mains. I did have to string it on the tighter side (#56) for control because the PA pattern is so open. A similar, cheaper combo is Tour Bite or HyperG mains with Pro Line II crosses.

If I were still using the PA, I would also definitely try Kirschbaum MP Rough 17 in the mains and regular MP 17 in the crosses. MP are prestretched strings that offer a firm but not harsh feel with minimal trampolining, good spin, and great control. For me, MP retains its playability longer than any other poly I've tried except for Head Hawk, and I've tried a lot.

Just be aware that MP is a very heavy string and will add 4-6 points to the swingweight compared to most other similar gauge polys. If it's an issue, you can always use MP 18, which offers a little softer feel and more spin without sacrificing much control or string life.
Good suggestions, will try. Is Hawk as good as Max Power?
 

J D

Rookie
I did try Hawk 17 in my PA once and cut it out after 2 sessions. For me it really lacked feel and spin. I love Hawk in my Blades, but it just didn't seem to bring out the best in the PA in any way.
 

tlm

G.O.A.T.
Poly only plays good for a limited amount of time period. That’s why I change my string often, once you get used to playing with fresh poly it’s tough to play with the worn out crap that poly turns into.
 

KaiserW

Hall of Fame
Poly only plays good for a limited amount of time period. That’s why I change my string often, once you get used to playing with fresh poly it’s tough to play with the worn out crap that poly turns into.
How many hours do you play it?

I played great with Cyclone 19 in my RF. But one day I played horrible could not keep the ball in. This was my 5th outing with it and I determined it was the strings. Went to my gut/poly stick in the match and my control returned instantly.

Thinking about trying a thin poly again but maybe I should not go past 8 hours.
 

Hmgraphite1

Hall of Fame
How many hours do you play it?

I played great with Cyclone 19 in my RF. But one day I played horrible could not keep the ball in. This was my 5th outing with it and I determined it was the strings. Went to my gut/poly stick in the match and my control returned instantly.

Thinking about trying a thin poly again but maybe I should not go past 8 hours.
I haven't confirmed it but it seems the lighter gauges would wear out sooner. I currently have 18L proline2 and 19 cyclone in a couple racquets 95-18x20
 

tlm

G.O.A.T.
How many hours do you play it?

I played great with Cyclone 19 in my RF. But one day I played horrible could not keep the ball in. This was my 5th outing with it and I determined it was the strings. Went to my gut/poly stick in the match and my control returned instantly.

Thinking about trying a thin poly again but maybe I should not go past 8 hours.
I usually change strings in one of my rackets once a week and I play about 5 days a week. If I’m playing league match or against somebody tough I want to play my best against I will use a brand new string job. Then I will play one more serious match with that racket but after that it’s a practice stick. So it varies but I will use the same set up for a while if it’s just for practice or just hitting around.

A lot of people can play with the same poly for quite a while and they say it plays fine. I would say that what you found that by your 5th outing the string was going bad would be accurate. Plus the thinner string does not last as long. The string pattern plays a big part also. An 18x20 will last longer than an open pattern will.
 

tlm

G.O.A.T.
I haven't confirmed it but it seems the lighter gauges would wear out sooner. I currently have 18L proline2 and 19 cyclone in a couple racquets 95-18x20
In a 95 with a tight string pattern your poly should last pretty long.
 

Yoneyama

Hall of Fame
After 6 to 8 hours, strings become like a trampoline, rocket launcher. Using polys in Pure Aero at 52 pounds; once at 55 pounds.

Haven't tried Kirchbaum yet.

What will help to avoid this? Increase the tension? Pre stretching? Use strings with better tension maintenance or multi at higher tensions?
Put a lot of babolat elasocross string savers in it. It’ll stiffen up the bed and reduce the trampolining. That being said if the poly is dead i’d judge cut it out as you will end up hurting your wrist or arm.
 

Bartelby

Bionic Poster
I'm with you on this one. There's more spring in fresh poly than in dead poly. People must indeed by over-hitting.

So poly to me reaches a point where it doesn't stretch, zero elasticity. At this point the strings feel harsh and are extremely low power. So we need to swing harder to get the ball deep. The ball flies cause were swinging harder. Is this trampoline? It's not what I've noticed
 

Bartelby

Bionic Poster
I used silicone as a lubricant, but my house is full of coconut oil and it smells better.

Apply a lubricant. I like coconut oil. It doesn't take much of it for it to be effective. If the strings are able to slide against each other, they will not lock up and fall into a pocket or trampoline situation. Also the added snap back is evidence of a spinny string bed.
 

oldno7

New User
IME, some polys continue to drop tension and trampoline more while others go dead and/or lock up, losing power. I found the ideal situation for me was to use a hybrid with one of each. With the right combo, they can offset each other's aging issues pretty effectively.

I ended up with ALU Power Spin in the mains and regular ALU Power Silver in the crosses in my PA. Although the feel did change over time, playability, power, and trampolining were really pretty consistent until the texture wore off the mains. I did have to string it on the tighter side (#56) for control because the PA pattern is so open. A similar, cheaper combo is Tour Bite or HyperG mains with Pro Line II crosses.

If I were still using the PA, I would also definitely try Kirschbaum MP Rough 17 in the mains and regular MP 17 in the crosses. MP are prestretched strings that offer a firm but not harsh feel with minimal trampolining, good spin, and great control. For me, MP retains its playability longer than any other poly I've tried except for Head Hawk, and I've tried a lot.

Just be aware that MP is a very heavy string and will add 4-6 points to the swingweight compared to most other similar gauge polys. If it's an issue, you can always use MP 18, which offers a little softer feel and more spin without sacrificing much control or string life.
In your ALU hybrid, which one is the one that eventually trampolines and which goes dead?

I find that soft strings often end up trampolining.
 

tennisbike

Professional
One more option: Based on my observation that the aging of poly depends on the number of impact experience which lead to center string more aged than off center part of the string. More tension is lost in the center strings. If you retension the main strings, the stringbed may feel uniform again. I define trampoline as uneven response of the stringbed, meaning the stringbed has a hot spot probably in the center.

To accomplish that though, one has to remove the cross strings then untie the main string to re-tension. I did the next best thing. After removing the cross string, I "walk" the tension from center to the side strings so that the center strings are tighter than before. Using SM, I know that I can equalize the 6 center to a pretty decent range and let the other string go a bit lower.

In general, I am in agreement with JET method where I drop tension on #4, 5, and 6 on 16 main. And I drop 3 to 4 lbs on cross but keep the top and bottom 2 cross higher. I think this way the center cross has lower tension and lower friction that can inhibit main snap-back.
 

blai212

Hall of Fame
if u want your string to have longer playability then get a string with higher playability duration...sounds obv right?IME yonex has longest playability duration in poly tour pro/strike...also keep in mind that they are round polys so the launch angle is much lower...if you want higher launch angle, use a shaped poly in mains for more bite and to hit higher, all depends on what you’re looking for...personally i like low launch angles to keep the ball low but it also results in more shots into the net...


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