Timeline for Changing front chainrings
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 17, 2022 at 6:35 | vote | accept | Dan | ||
| Dec 17, 2022 at 6:35 | vote | accept | Dan | ||
| Dec 17, 2022 at 6:35 | |||||
| Dec 17, 2022 at 2:22 | comment | added | Nathan Knutson | @Dan Yes you can put any mountain 10 cassette on your existing hub. "Going there" though is something that to me only would begin to make sense if the whole drivetrain was worn out - deraileurs, shifters, and all, and there was really a need for a complete refresh. It's a 16 year old bike so maybe that's where it's at, but if not I feel the upside is marginal with going that direction. There is a finickiness penalty with going to a higher speed count, and 9 is a pretty darn good middle ground for touring bikes. | |
| Dec 16, 2022 at 22:39 | comment | added | Dan | Very good info, thank you. I need to spend some more time researching and seeing what I can find. In my earlier comment I was actually referring to switching the entire groupset (FD, RD, crankset, etc) to the Deore XT Trekking version. It would be pricey but it would be the modern version of how I'm looking to set up the bike. Would a 10-speed cassette fit on a 9-speed rear Deore LX hub? But it's also good to know that it might be an option to use a 10-speed crankset with a 9-speed derailleur. Most likely though, I will get a mountain triple, a mountain FD and BB. | |
| Dec 16, 2022 at 22:28 | comment | added | Nathan Knutson | The XT trekking cranks would work and then you would just use any of the Shimano mountain external BBs. You may need to tune the ring spacing with teeny chainring spacers under the small and large rings to work with 9-speed without the chain rubbing. That is a change you could make later if needed, and it's not a big deal - you just buy 8 of the Wheels Mfg 0.6mm chainring spacers and slip them in, then re-adjust the FD. | |
| Dec 16, 2022 at 22:25 | comment | added | Nathan Knutson | @Dan I edited my answer to address the BB question. In your case, for the 105 cranks listed as stock, you presumably have an Octalink v1 BB that is not compatible with almost any mountain triple crank you might find. Generally speaking all you're going to do is choose your crank, and then choose whatever BB is listed as the normal or default option if it's a mountain triple. | |
| Dec 16, 2022 at 22:19 | history | edited | Nathan Knutson | CC BY-SA 4.0 |
added 474 characters in body
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| Dec 16, 2022 at 21:15 | comment | added | Dan | Another more expensive option I am considering is using the Deore-XT Trekking groupset: bike.shimano.com/en-US/product/component/deorext-t8000.html . I am not sure if the Dura-Ace 10-speed bar-end shifters would work with that rear-derailleur though. Also seems really hard to find from US retailers. | |
| Dec 16, 2022 at 20:56 | comment | added | Dan | Thanks for the detailed reply. You bring up some things I didn't think about. Regarding top ring, I really have no use for a 52. Nor a 50. 48 or 46 is probably the sweet spot but I am fine with a 44 as well. This bike is not being built for speed. Regarding q-factor, it sounds like switching to a MTB BB would be a good idea? Since this is my first frame-up build, my goal is to do this in the simplest and most "Shimano-approved" compatible way. So preferably not exceeding RD capacity even if it technically works. | |
| Dec 16, 2022 at 19:54 | history | answered | Nathan Knutson | CC BY-SA 4.0 |