lockrings for fulcrum 10s fw

acidstrato

8,9,10s shim freewheel on my fulcrum R1s but the lock ring i have doesnt fit the 11t and the right one is pretty dear. so does anybody know the diameter for the ricg needed and whether these token ones would be ok?

http://www.chainreactioncycles.com/Mode ... elID=38651

i had no idea fulcrum did this? only noticed today as i dont use my ribble much but whilst making sure it was set up correctly earlier i noticed i cant use my 11t gear and this is why. just wish i hadnt fucked up the cable tension i had before i found the problem as it was spot on

nicklouse

any shimano 11T compatible lock-ring will do.

acidstrato

i wish that were the case

but the one which came with the ultegra cassette is a completely differen size to the free wheel on the fulcrums

Monty Dog

Depends on freehub body material in a lot of cases - alloy bodies generally take a smaller thread.

nicklouse

Monty Dog
yes but the OP says it fits

as i dont use my ribble much but whilst making sure it was set up correctly earlier i noticed i cant use my 11t gear and this is why.

which to me says that it is not a 11T lockring but one off a different cassette with a bigger bottom cog.

acidstrato

thats right, it is the fulcrum own one supplied with the wheels from new and is designed for a 12t final cog.

so it basically covers the majority of the surface area of the cog and the chain cannot engage correcly and just jumps up instead as if the cable tuning was wrong


fulcrum supply the 11t one separately at a cost which i've found 15quid to be the cheapest :shock: so gotta be an alternative surely. just havent got around to check the diameter or thread size yet. got a feeling the token one i linked too may be the right size though

louismichaels

Go for a Token one from Chain Reaction

acidstrato

yeah that didnt fit, it was exactly same size as original shimano part

Gabin

A Campagnolo 11T lockring fits and is a bit cheaper

http://www.ribblecycles.co.uk/sp/road-track-bike/Campagnolo-Lockring-for-11T-CS-501/CAMPCASZ260000000000

louismichaels

I've got Fulcrum Wheels with both the Shimano Freehub and the Campy Freehub; and 11T and 12T sprockets.
The appropriate Token Lockrings worked just fine.
One of these must be right!:
http://www.chainreactioncycles.com/Sear ... n+Lockring

Otherwise, contact Jim Walker. I called them about a Fulcrum wheel issue, and they were very helpful

acidstrato

CRC actually pointed me to their fulcrum spares section and they sell the actual fulcrum part...however its 14.99 and currently out of stock

the shimano 11t is what I ordered and it was exactly the same as the one that came with my 10sp cassette which have a too large diameter for the racing 1 freehub

louismichaels

Hi Acidstrato,
I got home from work a bit early today, and decided to dig out my Fulcrum freehub bodies to work out what might be going on.
I've got three: two Shimano compatible ones and one Campy compatible.
One of the Shimano bodies came with the wheels. It seems to be the limited production model for when Shimano had their 'high spline compatible' cassettes.
The second freehub body I bought 2008/2009.
Weirdly, I found the former freehub body uses a Campy lockring (smaller threaded diameter), and the latter a Shimano lockring (larger threaded diameter) - even though they were both designed for Shimano cassettes.
I don't know how old your wheels are, but it might be that, oddly, you need a Campy compatible lockring (despite the freehub body being designed to take a Shimano cassette).
Hope this helps.

acidstrato

mine are the 2009 model and I'm getting the feeling I've got the 10sp only style one for the 'high spline compatible' cassettes as you put it. so I guess a campy lockring

just for curioosity purposes as well i measured the 2 different sizes I have, he ultegra lockring is 35mm outer and 28or29mm inner diameter where as the fulcrum one has a 26mm inner but a 38mm outer which is why i cant ride on the 11t

ahwell got there in the end, thank you all for your assistance, hopefully anyone else that finds this weird issue in the future will come across this thread