May 31, 2017 · The key with these RPM belts is, in metallurgical terms (which has nothing to do with a belt), since they are "harder" they are also more "brittle" - and unlike a stretchy belt that can bounce all over the place - these RPM belts don't like being hard stopped by a tensioner at all and a single bounce off a stop can damage the belts core and make it break - so proper tensioning is SUPER important.

Mar 23, 2025 · The gates racing belts have been discounted, but I still offer the Gates HD belts, they're the way to go. And as @Vinnie_B said, I recommend the ARS tensioner. Our cars now 11+ years old and the stock tensioner can only take so much abuse, the ARS tensioner will help with any kind of belt slip and will last the life of the car. View attachment ...

Oct 10, 2012 · So I was looking at the 112.4'' Gates belts, and they have 2: the regular Micro V AT and the Micro V AT Heavy Duty. Parts numbers K081124 and K081124HD. The only description of the HD belt I can get is from Gates: "Consistently outperforms all competitors. Outstanding crack resistance at extreme temperatures.

May 31, 2017 · Good info Fishpick. After my RPM broke I did some research and saw a quote by Dustin Whipple where he no longer recommends the RPM belts. He suggests the shorter standard Gates belts with the tension set around 80%. For my 3.5 pulley/6 rib combo, Part# K061025 (102.5”) was recommended.

Apr 11, 2003 · As a sidenote, I compared the 3 month old Goodyear Gatorback belt #4080745 with the new Goodyear belt and there is a size difference. Both belts are the exact same part number, yet the old belt is now slightly longer than the new belt; therefore, the GOODYEAR BELTS DO STRETCH contrary to what I originally believed.

Mar 23, 2013 · Gates and Dayco is sort of like the Chevy vs Ford argument. FWIW, Dayco makes 99% all of the OEM Ford belts and pulleys, been to the factory and seen it myself, very cool facility. They even had an area designated solely to the road runner project.

Oct 11, 2017 · In the past I've never had issues with gates green belts. Since my nation's alternator swap, they all chirp for a few minutes. Then it goes away. Doesn't happen with the gatorback belt, but they don't last long at all. Having the carbinite coating on the blower pulley really eats up belts fast.

Nov 7, 2004 · The belts are identical and what the guy said is true. Gates simply repackages their green-stripe belt with the NAPA packaging for the auto parts giant. I called Gates about this early this year and confirmed that there are no physical differences. On a side note, NAPA charged me $42.00 for their belt and I bought it on-line for $27.00 plus ...

Nov 5, 2010 · just picked up a gates 74.5 green stripe micro-v belt. had a gatorback but took it back after reading up on how they tend to shred and the rave on these gates belts. whether thats true or not i dont know. but i also am installing a 2.75 RR ultra grip pulley with a billetflow redfire 4pc idler for a little flash under the hood.

May 20, 2018 · So on my 4.0 pulley with a gates k080785 was close to 50%. A gates k080774 was at 80% or so with the 3.5 pulley. So I picked up the Gates rpm k080780 after thinking about lengths of belts and where the tensioner would be at. But yeah it is Belt length dependent for sure. fyi: the belts I had are all newer so weren't stretched out over use.