What is the point of having an outer shell on multifilament strings?

MinDango

Rookie
The outer coating on my yonex rexis speed literally breaks after 5 minutes of hitting using it as a cross. The mains aren't even like poly they are syn gut. What is the point of any of the properties it has? And I don't even hit that hard. I'm a 4.5 woman who hits pretty flat.

For that matter, when companies advertise how an outer shell provides control or built in fibers offer control how does that even work? Like if the shell itself has different properties than the string inside, then won't the string just reflect the properties of the shell and then when it breaks, it will reflect the properties of the string inside? You aren't getting properties of both unless they somehow have the same elasticity and stiffness right? And in that case what is the point even? There will always be a limiting component that dictates the performance until it breaks.
 
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jimmy8

Legend
5 minutes! Get your money back.

Outer shell holds all the smaller filaments together. It's thicker on some strings and helps to make the string last longer, and gives a more stiff, crisp feeling, thus more control.

The outer shell and inner filaments are both felt at impact of a ball. Some strings have a higher quantity of extremely thin filaments with a thin outer shell and therefore you get a very soft string with a lot of power. You can feel both the shell and the inner filaments, they both stretch and bend at impact with a ball.
 

MinDango

Rookie
5 minutes! Get your money back.

Outer shell holds all the smaller filaments together. It's thicker on some strings and helps to make the string last longer, and gives a more stiff, crisp feeling, thus more control.

The outer shell and inner filaments are both felt at impact of a ball. Some strings have a higher quantity of extremely thin filaments with a thin outer shell and therefore you get a very soft string with a lot of power. You can feel both the shell and the inner filaments, they both stretch and bend at impact with a ball.

I kinda just assumed that was normal and rexis was just not designed to be played most of the time with the outer coating intact.

Any suggestions for multis with a more durable outer coating? Velocity MLT has been great for me and I've heard good things about technifibre HDMX. Looking for a durable multi that offers good control and feel.
 

jimmy8

Legend
I kinda just assumed that was normal and rexis was just not designed to be played most of the time with the outer coating intact.

Any suggestions for multis with a more durable outer coating? Velocity MLT has been great for me and I've heard good things about technifibre HDMX. Looking for a durable multi that offers good control and feel.
I use velocity 1.30 natural color. It has a thicker outer sheath than other multis. Good control and feel.

I don't know of any other multis with thicker outer sheaths.
 

pabletion

Hall of Fame
They
The outer coating on my yonex rexis speed literally breaks after 5 minutes of hitting using it as a cross. The mains aren't even like poly they are syn gut. What is the point of any of the properties it has? And I don't even hit that hard. I'm a 4.5 woman who hits pretty flat.

For that matter, when companies advertise how an outer shell provides control or built in fibers offer control how does that even work? Like if the shell itself has different properties than the string inside, then won't the string just reflect the properties of the shell and then when it breaks, it will reflect the properties of the string inside? You aren't getting properties of both unless they somehow have the same elasticity and stiffness right? And in that case what is the point even? There will always be a limiting component that dictates the performance until it breaks.

They do outer coating bc they havent figured out how to bond together all of those multi filaments..... BUT Tecnifibre has figured it all out. Get some Triax or HDMX. No coating, just multifilaments "glued" together.

Thats why theyre the best.
 

ClownCar96

Semi-Pro
The outer coating on my yonex rexis speed literally breaks after 5 minutes of hitting using it as a cross. The mains aren't even like poly they are syn gut. What is the point of any of the properties it has? And I don't even hit that hard. I'm a 4.5 woman who hits pretty flat.

For that matter, when companies advertise how an outer shell provides control or built in fibers offer control how does that even work? Like if the shell itself has different properties than the string inside, then won't the string just reflect the properties of the shell and then when it breaks, it will reflect the properties of the string inside? You aren't getting properties of both unless they somehow have the same elasticity and stiffness right? And in that case what is the point even? There will always be a limiting component that dictates the performance until it breaks.
Try isospeed axon multi. great string with a shell that holds up well. Axon Multi https://www.tennis-warehouse.com/ISOSPEED_AXON_Multi_16L_125_String/descpageACISO-ISOAXMUL16L.html

Some on here have nicknamed it the "Holy Grail" Holy Grail Found
 

LOBALOT

Hall of Fame
As a 4.5 I would cross a multi with a poly cross instead. You will eventually snap the mains but will get better overall performance while it is in the racquet and perhaps hitting flat it last longer before the snap. Full bed multi of almost anything will lock as you point out.

Try 16G velocity and 17g round poly of your choice and I would string the mains at or maybe a tad higher than your full bed setup and then drop the tension on the poly cross lower so you get a bit more net clearance as you indicate you are a flat hitter that will help a bit with launch angle.

My preferred setup is velocity / Ghostwire or velocity / Cream but you may want a stiffer poly cross depending on your preference.

Give that a try.
 
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