Scenario: I've got an old road bike and would like to put new forks to smooth out the vibrations (the old ones are really rough). Also had a professional bike fit and was recommended to get a longer stem and wider handlebars.
Option: Since I'm basically rebuilding the front end, I figure I may as well upgrade to new Aheadset, etc. I know i have to match the headset size to the fork steering tube when I start buying.
Question: Do I need to match the upper and lower cups to the head tube diameter, or is this a standerd size?
Most "old road" bikes used the one-inch steering column. Howver, there is more than one standard for the one-inch column, but the two likely options are the "JIS" and the so- called "Euro" standard. Measure the OD of the cups. For standards see the bottom of parktool.comrepairOpen ↗ help/howfix_headthreadless.shtml If you have a cup of 29.8mm, the frame can be reamed to fit the larger 30.0mm cups of the "euro" standard. Most after-market headsets come in the euro standard.
Quoted message said:
Scenario: I've got an old road bike and would like to put new forks to smooth out the vibrations (the old ones are really rough). Also had a professional bike fit and was recommended to get a longer stem and wider handlebars.
Option: Since I'm basically rebuilding the front end, I figure I may as well upgrade to new Aheadset, etc. I know i have to match the headset size to the fork steering tube when I start buying.
Question: Do I need to match the upper and lower cups to the head tube diameter, or is this a standerd size?
If the crown race is 27mm, it is JIS and the cups are 30mm rather than 30.2mm and might not have the interference for fit. Often as important is axle to crown distance. Modern forks hover around 370mm and older bikes can top 400mm. If either mismatch exists it is still doable but choices are more limited. Tom
-- Bruni Bicycles "Where art meets science" brunibicycles.com 410.426.3420 Bow <[email hidden]> wrote in message "]news:[email hidden]...
Quoted message said:
Scenario: I've got an old road bike and would like to put new forks to smooth out
the
Quoted message said:
vibrations (the old ones are really rough). Also had a professional bike
fit
Quoted message said:
and was recommended to get a longer stem and wider handlebars.
Option: Since I'm basically rebuilding the front end, I figure I may as well
upgrade
Quoted message said:
to new Aheadset, etc. I know i have to match the headset size to the fork steering tube when I start buying.
Question: Do I need to match the upper and lower cups to the head tube diameter,
