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Doing a service on my Giant Revolt and managed to confuse myself with the typical Giant odd standard rubbish.
First off the headset bottom bearing was a bit crunchy. It's a Road Overdrive Integrated 1 1/8" to 1 1/4" tapered, what confused me is there doesn't seem to be a any kind of seal or crown race, the bearing sits in the headtube and the carbon fork just slots in with the bearing resting on the fork crown. Seemed odd, was about to order an FSA integrated for the same bearing sizes:
http://www.chainreactioncycles.com/fsa-orbit-c-33-acb-headset-no-44e-/rp-prod80062
Second confusing bit is the chainrings and front mech, looks to be 110mm, 5 bolt Shimano Road but it's non-series OEM numbers - R460.
From what I can find, R460 looks to be OEM Tiagra equivilent.
Chainrings are 46-34 and even though I'm slow and not very good, I'm finding that I'm only ever in the top three gears and wanting more (No hills in the Vale of York).
Thought of getting a pair of 50\36 chainrings but can't find any specs that say the FD-R460 will work.
I'm guessing it will as I can move the clamp up a bit and a 16T drop between rings seems common for road 10 speed double mechs.
Anyone done similar with Giant's minefield of OEM parts. I love the Revolt but this just reminds me why I also prefer buy a frame and the parts for self build.
Hi,
I haven't pulled a Revolt headset apart but from from my other experience with Giant forks my guess is the crown race is integrated into the fork.
I would get the numbers of the bearings and just order them individually.
If you cannot find them get the frame number of the bike and any Giant dealer would be able to get them for you.
Should be a standard size though.
If the bolt circle is 110 BCD it is a standard compact road size.
Plenty of rings available from Sora to Dura Ace.
Some OEM Shimano rings available too.
Yeah just raise mech up to accommodate and you will be fine.
Thanks,
Max
Cheers, was considering just getting bearings as there didn't seem to be much else involved with the headset. Top seals and parts all look OK.
I wonder if the race was built into the fork but it just seemed a rough bit of taper where the carbon legs are bonded to the alloy steerer. The lower parts of the bearing are showing a bit of corrosion on the outer edge, not too fussed if I can just swap out the bearing every couple of years. More confused that something could have been missing.
Ta for the rings info, thought it would be OK but a double check never harms and saves a classified ad later 🙂