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Old 11-13-10, 12:10 PM   #1
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Steerer length rule of thumb?

Is there one as compared to head tube length? My current steerer is 25cm in a 15cm Headtube (so 10cm longer than HT). I think I can make it work with a new frame I am considering with 17cm HT since I have more than 2cm of spacers in current set up. I infer I can just lose whatever spacers I dont need. Am I missing something?
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Old 11-13-10, 12:18 PM   #2
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you did not take into account the current stack height of your headset. if you swap headsets to the new frame then it should be fine, in your situation.
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Old 11-13-10, 12:18 PM   #3
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Threadless ?, dont cut it , buy more spacers , some above the stem are FINE.

Find out what feels like the best fit for you. Ride the bike for a fwe months.

rules of thumbs are not for people, even their thumbs are different size..
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Old 11-13-10, 12:26 PM   #4
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the only rule I have about steerer tubes/headsets is, I never cut/trim it unless the 'extra' is more than an inch.
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Old 11-13-10, 12:31 PM   #5
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Remember to take the headset height into consideration (if a new/different or integrated headset is being used). A 2cm change in height (by way of removing spacers) won't matter at all, but try to keep at least one spacer in place between the stem and headset.

Edit: beaten to the punch, badly
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Old 11-13-10, 12:54 PM   #6
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Threadless ?, dont cut it , buy more spacers , some above the stem are FINE.

Find out what feels like the best fit for you. Ride the bike for a fwe months.

rules of thumbs are not for people, even their thumbs are different size..
Trying to determine whether my current steerer is too short for longer HT, so no plans to cut.
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Old 11-13-10, 01:16 PM   #7
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basic math .. headset stack height + thickness of stem clamp + headtube height
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Old 11-13-10, 02:31 PM   #8
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basic math .. headset stack height + thickness of stem clamp + headtube height
Thats what I figured. Thanks
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Old 11-13-10, 03:07 PM   #9
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Related headset Question

At this point I plan to reuse the headset from my other frame so stack height will be same. However, I am considering just getting a new headset because the seals on the old headset are looking pretty worn.

Assuming I get one with similar stack height so steerer length isn't an issue, will I have an issue with crown race on my current fork? That is, will I have to swap out whats on there for the one than comes with the new headset (race is not pitted), particularly if I get cartridge bearing rather than the caged balls I have now? Or are crown races for 1 1/8 headset pretty much standard.
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Old 11-13-10, 05:24 PM   #10
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At this point I plan to reuse the headset from my other frame so stack height will be same. However, I am considering just getting a new headset because the seals on the old headset are looking pretty worn.

Assuming I get one with similar stack height so steerer length isn't an issue, will I have an issue with crown race on my current fork? That is, will I have to swap out whats on there for the one than comes with the new headset (race is not pitted), particularly if I get cartridge bearing rather than the caged balls I have now? Or are crown races for 1 1/8 headset pretty much standard.
Yet another question. Since I will be using a fork I already have , I had planned to use the calipers that I have. I just noticed that Soma says their frame was "designed with 57mm brakes in mind". Since most 57mm brakes have a range of 47-57mm, should I expect that my maximum 49mm caliper brakes will work on rear as long as I go with skinnier tires? Or am I looking at needing new longer reach brakes?
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Old 11-13-10, 10:41 PM   #11
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1 1/8 crown racers are pretty much standard.

Tyre size is irrelevant to brake reach. If soma says you need 57mm of brake reach, you will need 57mm of brake reach. Who cares what they say anyways. A 30 second installation test of the brakes will tell you definitively if your current brakes will not work.
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Old 11-14-10, 11:20 AM   #12
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1 Tyre size is irrelevant to brake reach. If soma says you need 57mm of brake reach, you will need 57mm of brake reach. Who cares what they say anyways. A 30 second installation test of the brakes will tell you definitively if your current brakes will not work.
Kinda what I was thinking. Buy the frame, if my brakes work, great, if not, Tektro long reach brakes don't cost much.
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