bonsai171

Anyone familiar with the Paul sram shift adapter? I want to build a gravel bike with low gearing (sub 20 gear inches) since the grx and Sram 1x drivetrains I see on complete bikes don't have what I want.

Found this adapter to mount a sram mtb shifter to 31.8mm drop bars:
https://www.paulcomp.com/shop/components/drivetrain/shifting/sram-shifter-adaptor/

Has anyone built a bike around this? I want to use a sram nx 1x12 drivetrain, and am wondering how to make sure it will work with the frame I pick (either Jamis Escapade or Niner rlt 9 RDO). Would the nx 12 speed cassette work on 11 speed wheels? I understand it doesn't use the XD driver.

Any help would be appreciated.

Dave

veganbikes

I haven't yet used the Paul adapter but know it enough. It is a neat option until SRAM and Shimano adapt to really wide range gearing on drop bars that isn't super expensive electronic gearing. However would rather see something like the Gevenalle shifters being adapted for SRAM 12 speed that would mean I don't have to move my hands to shift. Granted I really dig these alternative bars like the Surly Moloko and Koga Denham bars for gravel and touring bikes. I still love drop bars but so far nobody quite makes the bar I want.

The NX cassette should work on 11 speed wheels. The main reason for alternative stuff is for 10t cogs which cannot quite fit on a standard S type freehub. You shouldn't have problems making it work

It should be a fun build, the Jamis Renegade is a fantastic bike and if I hadn't gotten a good deal on my Specialized Sequoia frame (pro-module technically) I was considering that one. I really dig the paint work, the topo maps are really neat and Reynolds steel is good stuff. My only wish on all of this stuff is everyone would go with the Rodeo Labs Spork as that seems to be the best of the carbon adventure forks with all the dynamo capabilities and rack mounting. However that is a tiny issue and effects most bikes rather minimally.

bonsai171

That pretty much sums it up. SRAM AXS has great gear range, but it soooo expensive. I guy I rode with a few weeks ago has a Salsa Cutthroat with SRAM Force, and wants to run AXS. The drivetrain is $2k alone, without shifters. Ouch! The SRAM NX drivetrain is only $375, and then you add in a bottom bracket, and wind up just over $400. Agreed on the cockpit too. It would be awesome having the shifters and brake levers integrated. For now I think that is a good tradeoff, since I haven't found another way to get low gears without mortaging the house lol. Only think I'm wondering about is the bottom bracket. Looks like the Jamis uses a threaded BB? Any idea of it's the standard english threaded 68mm ? Would really like to get a chance to ride a renegade before buying the frame. The geometry looks really nice with the rising top tube and lots of exposed seat tube. Will probably test a Cervelo Aspero and Salsa Cutthroat too, just to make sure the Jamis is the right bike.

How does the Reynolds 631 differ from Reynolds 520? Got the Kilo TT which is Reynolds 520. Granted, these two bikes are very different geometries, but I'm guessing the Reynolds 631 is more compliant and lighter?

Dave

veganbikes

I believe the Jamis is still threaded I would be really pissed if not. The 631 is a nicer air hardened tubing based on 853 but not heat treated which all came from the classic and well regarded 531 that graced so many great steel frames for many many many years. I am unsure but I guess that the formulation of these tubes is different from 4130

The 520 is a lower cost Taiwan made Chromoly steel which is still made to their standards but is not heat treated or air hardened like 853 or 631. I would say 520 is probably a step up from generico 4130 but probably nothing super massive.

I would say potentially a handbuilt frame by a competent frame builder tuned to your specs in 520 might ride a little better than a stock more mass market 631 bike. However comparing both together as the same I would probably want the 631.

buck1973

Gevenalle recently came out with SRAM 12 speed compatible hydraulic levers: https://www.gevenalle.com/product/hydraulic-1x12/

veganbikes

All righty then go Gevenalle. No reason for Paul adaptor anymore (sorry Paul I do still love your other stuff) You have good mineral oil actuated brakes with 12 speed shifting either for ScRAM or Shimango. Maybe I need to rethink an upcoming build?

bonsai171

That is kind of interesting. Reminds me of a mtb I had as a kid. Almost looks like a thumb shifter vertically mounted. Wish they found a way to route the cable under the bar.

I'll probably wind up going with Paul. Made some calls, and a dealer not too far away has some renegades. He has the expat, which is the same as the frameset Jamis sells. Going to test ride, will probably buy a frame from them.

Dave

veganbikes

It is basically a thumbie. It would be cool to make it all aero but I doubt that will ever happen. Nice check them out, the Jamis is a neat bike.