Wanted Pace RC 30 1 1/4 threaded. Fork or crown/steerer
- Thread starter Tomac23
- Start date
Thank you. I think I’ve found a crown so I’ll message you about the steerer. Cheers
Would be interested in seeing some images of RC30 1 1/4” … briefly wondered if I had one but , think much more likely is 1 1/8” as that’s the steerer am running in it currently.
Looked online but difficult to discern differences from images have seen.
GLW project
Corrected by @justbackdated below 
The 1-1/8" and 1-1/4" onesshare the same crown [are]
It is identifiable by the bulge in the front and rear faces:
[On later models] When running a 1-1/8" steerer, there's a step-down shim incorporated into the headset crown race. This is omitted when running a 1-1/4" steerer.
The 1"-only crowns are flat-faced front and back:
All the best,
The 1-1/8" and 1-1/4" ones
[On later models] When running a 1-1/8" steerer, there's a step-down shim incorporated into the headset crown race. This is omitted when running a 1-1/4" steerer.
The 1"-only crowns are flat-faced front and back:
All the best,
Last edited:
Awesome thanks for detailed info @danson67 … was wondering if that was the case…there’s a 1 1/4” : 1” shim being offered on @justbackdated ebay sales page…with this new knowledge might have to consider getting that part in stock.
For reference here are my RC30s + 1 1/8” steerer tube + CK crown (since removed to reveal the Pace shim / crown race part described above)
For reference here are my RC30s + 1 1/8” steerer tube + CK crown (since removed to reveal the Pace shim / crown race part described above)
justbackdated
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The original RC30/35 crowns were made with steerer socket sizes to suit the steerers.
They were produced with:
1”
1 1/8”
1 1/4”
Indeed, as Danson points out, the 1” easily spotted with its flat face. The 1 1/8” and 1 1/4” had the bulge in the face, the 1 1/4” was obviously larger/wider. The crowns had a well on top into which the lower flange of the crown race collar would fit. On later crowns this was omitted. Reducer shims then introduced could allow smaller steerers to be fitted in the two larger size crowns
Later, notably in conjunction with the release of the 1995 RC35 MXC/D fork with its 1 1/4” steerer socket as standard, reducer shims were required to allow fitment of the two smaller steerer sizes in the crown.
In 1997 with the release of the RC36 all crowns went to 1 1/8” steerer socket, a reducer shim still allowed 1” steerers to be fitted, but that was the end for 1 1/4”
They were produced with:
1”
1 1/8”
1 1/4”
Indeed, as Danson points out, the 1” easily spotted with its flat face. The 1 1/8” and 1 1/4” had the bulge in the face, the 1 1/4” was obviously larger/wider. The crowns had a well on top into which the lower flange of the crown race collar would fit. On later crowns this was omitted. Reducer shims then introduced could allow smaller steerers to be fitted in the two larger size crowns
Later, notably in conjunction with the release of the 1995 RC35 MXC/D fork with its 1 1/4” steerer socket as standard, reducer shims were required to allow fitment of the two smaller steerer sizes in the crown.
In 1997 with the release of the RC36 all crowns went to 1 1/8” steerer socket, a reducer shim still allowed 1” steerers to be fitted, but that was the end for 1 1/4”
