Thinking of making a radical drivetrain change
08-10-19, 09:37 PM
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BluesDawg, can you please give more details about your setup? You have exactly what I'm wanting in a new bike build!
I've been searching and asking online for weeks for a solution, and you are the ONLY person that has this setup! Sram specs state that the Rival 22 rear derailleur can only handle up to an 11-32 cassette and 37t capacity...I know that bike companies are conservative with their numbers...Your setup goes 4t beyond their max cog, and 4t beyond their max capacity. Are you using the most recent version of the Rival 22 groupset? Are you using a Sram MTB GX 10-speed rear derailleur? And what kind of bike frame is all this on? (I'm wanting to put mine on a CF road bike.)
Thank you B.D.,
Mike
08-11-19, 02:49 PM
#27
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This is a road-bike question, but I'm posting it in the Cyclocross/Gravelbiking forum because it involves cross/gravel gearing.
For close to 20 years, I've run old-fashioned road triples on both my road bikes (one Waterford, one Gunnar) On both, I run Ultegra 52/42/26 setups with 13-36 cassettes. At age 64, after back surgery and two bouts with cancer, I can no longer push big gears. I'm thinking of changing the gears on one of the bikes to more of a cyclocross/gravel setup. I'm looking at replacing the current triple crankset with a White Industries VBC (variable bolt circle) double crankset that combines a 44T big ring with at 24T small ring. I'd couple that with 11-speed SRAM shifters / derailleurs and an 11-42T cassette.
Does anyone see any potential pitfalls in such a setup? It won't be cheap ($1k or thereabouts), but I think it will give me the low gearing I need to climb the short-but-steep hills I ride here in West Virginia. Your thoughts? Thanks!
For close to 20 years, I've run old-fashioned road triples on both my road bikes (one Waterford, one Gunnar) On both, I run Ultegra 52/42/26 setups with 13-36 cassettes. At age 64, after back surgery and two bouts with cancer, I can no longer push big gears. I'm thinking of changing the gears on one of the bikes to more of a cyclocross/gravel setup. I'm looking at replacing the current triple crankset with a White Industries VBC (variable bolt circle) double crankset that combines a 44T big ring with at 24T small ring. I'd couple that with 11-speed SRAM shifters / derailleurs and an 11-42T cassette.
Does anyone see any potential pitfalls in such a setup? It won't be cheap ($1k or thereabouts), but I think it will give me the low gearing I need to climb the short-but-steep hills I ride here in West Virginia. Your thoughts? Thanks!
Last edited by Chi_Z; 08-11-19 at 03:01 PM.
08-11-19, 03:37 PM
#28
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BluesDawg, can you please give more details about your setup? You have exactly what I'm wanting in a new bike build!
I've been searching and asking online for weeks for a solution, and you are the ONLY person that has this setup! Sram specs state that the Rival 22 rear derailleur can only handle up to an 11-32 cassette and 37t capacity...I know that bike companies are conservative with their numbers...Your setup goes 4t beyond their max cog, and 4t beyond their max capacity. Are you using the most recent version of the Rival 22 groupset? Are you using a Sram MTB GX 10-speed rear derailleur? And what kind of bike frame is all this on? (I'm wanting to put mine on a CF road bike.)
Thank you B.D.,
Mike
I've been searching and asking online for weeks for a solution, and you are the ONLY person that has this setup! Sram specs state that the Rival 22 rear derailleur can only handle up to an 11-32 cassette and 37t capacity...I know that bike companies are conservative with their numbers...Your setup goes 4t beyond their max cog, and 4t beyond their max capacity. Are you using the most recent version of the Rival 22 groupset? Are you using a Sram MTB GX 10-speed rear derailleur? And what kind of bike frame is all this on? (I'm wanting to put mine on a CF road bike.)
Thank you B.D.,
Mike
As you said, manufacturers tend to be quite conservative with their largest cog size and greatest chain wrap capacity numbers. I have been exceeding them for years with different components.
This one is SRAM Rival 22 HRD levers, Rival 22 WiFli rear derailleur, PG-1170 11-36 cassette. I first had this on a 2018 All-City Cosmic Stallion steel-frame gravel bike. It is now on a 2019 Black Mtn Cycles MCD steel-frame gravel bike. I have seen (and helped install) the same gearing except Force 22 on a carbon-frame Niner RLT 9 RDO gravel bike. All of these were with standard mounting hardware and just a few extr turns of the B screw. No need for reversing the screw or installing a longer screw. YMMV
08-16-19, 02:58 PM
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Thank you all VERY much for taking the time to reply. I was just about to pull the trigger on the SRAM-White Industries option when I learned of the new Shimano GRX components. I've elected to go with Shimano Ultegra 8000 11-speed brifters, the new GRX-810 rear and front derailleurs, the GRX 46-30 crankset and a 11-42T cassette with RoadLink. From everything I've read, all those components should play nicely together. Construction will begin as soon as the parts arrive. Again, thanks for your input!
08-16-19, 05:25 PM
#30
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A 42 cog is outside the spec range for the XTR rear derailleur (40 tooth max).
The chain wrap for that setup is 47 teeth, which also exceeds the chain wrap for that derailleur (45 max).
Many people exceed the spec range on derailleurs. Some say their out-of-spec gears shift just fine, but I have seen too many people struggle with theirs.
I recommend staying within the Shimano spec.
The chain wrap for that setup is 47 teeth, which also exceeds the chain wrap for that derailleur (45 max).
Many people exceed the spec range on derailleurs. Some say their out-of-spec gears shift just fine, but I have seen too many people struggle with theirs.
I recommend staying within the Shimano spec.
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08-16-19, 09:05 PM
#31
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A 42 cog is outside the spec range for the XTR rear derailleur (40 tooth max).
The chain wrap for that setup is 47 teeth, which also exceeds the chain wrap for that derailleur (45 max).
Many people exceed the spec range on derailleurs. Some say their out-of-spec gears shift just fine, but I have seen too many people struggle with theirs.
I recommend staying within the Shimano spec.
The chain wrap for that setup is 47 teeth, which also exceeds the chain wrap for that derailleur (45 max).
Many people exceed the spec range on derailleurs. Some say their out-of-spec gears shift just fine, but I have seen too many people struggle with theirs.
I recommend staying within the Shimano spec.
https://bike.shimano.com/en-EU/produ...-M8050-GS.html
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