Thundercat/ZR9000 belts

[Woody255]

Hi all, for the Tcat guys here…can anyone confirm if the belts from 2017-2019 Thundercat/ZR9000’s are interchangeable? The part numbers are different, but I’m not aware of clutching changes between the 17-19 model years….thanks in advance.

 

[Fords4life]

Hi all, for the Tcat guys here…can anyone confirm if the belts from 2017-2019 Thundercat/ZR9000’s are interchangeable? The part numbers are different, but I’m not aware of clutching changes between the 17-19 model years….thanks in advance.

They are interchangable, clutchs all the same, i use ultimax 829 some guys use ultimax 827, factory cat belt is 112 i believe.

 

[Woody255]

Ok thanks. Any idea why they have different part numbers?

 

[Turboflash]

Different part numbers because supposedly the rubber compounds are slightly different. The 627-104 belt is slightly softer than 627-112 but hard to detect in the field.
Also, Timken XS-827 belt (which cross-references to only 2017 TCats) is 45-1/16" x 1.50". The XS-829 belt (2018 & newer TCats) is 44-15/16" x 1.50" (slightly shorter).
I've tried both and prefer 827 because it is softer and grips clutches better.
IMO, XS is the ONLY belt that will stand punishment. Cat belts I could destroy at will. Tried Dayco XTX (way too hard - belt slip). Tried Gates GForce and carbon fiber. NFG! They would shred easily.

 

[Fords4life]

Ok thanks. Any idea why they have different part numbers?

I believe it is was diffrant rubber compounds, some say 827 has better grip than 829, i dont know that, have only ran the 829.

 

[Woody255]

Thanks Turboflash! On my sidewinder, the XS was the only belts that would survive as well. The Tcat is a new build, and broke the 112 belt in half. I’ve ordered XS829’s, but delivery won’t be in time for Saturday’s race. I’m scrambling for a spare!

 

[earthling]

Different part numbers because supposedly the rubber compounds are slightly different. The 627-104 belt is slightly softer than 627-112 but hard to detect in the field.
Also, Timken XS-827 belt (which cross-references to only 2017 TCats) is 45-1/16" x 1.50". The XS-829 belt (2018 & newer TCats) is 44-15/16" x 1.50" (slightly shorter).
I've tried both and prefer 827 because it is softer and grips clutches better.
IMO, XS is the ONLY belt that will stand punishment. Cat belts I could destroy at will. Tried Dayco XTX (way too hard - belt slip). Tried Gates GForce and carbon fiber. NFG! They would shred easily.

Are either a direct replacement for the stock belts?

 

[Crossfire12]

Yes, 829 grips better, the other hard compound, one’s slightly longer.