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Mid School BMX (>87) 1989 to 2003 (<05) => Mid School ( Keep the faith ) => Topic started by: gavprimo on February 11, 2014, 01:05 PM

Title: Mid school chain ring shim/top hat washer
Post by: gavprimo on February 11, 2014, 01:05 PM: My Fly bikes cranks turned up yesterday, very nice, and have a 22mm spindle. Today my 39t Federal chainring came, but it looks like I need a 23.8mm - 22mm top hat washer to go on there, with it being a 10 year old chainring.

I may have one in the shed of course, but just in case I don't, does anyone know where I can get one as most of the online places I've looked don't seem to have them.

cheers
Gav
Title: Re: Mid school chain ring shim/top hat washer
Post by: Gary72 on February 11, 2014, 05:25 PM: I have a tub of various top hats, If you need one I'll have a check and see if I spare one :daumenhoch:
Title: Re: Mid school chain ring shim/top hat washer
Post by: gavprimo on February 11, 2014, 10:28 PM: Ah thanks that's kind of you, I've checked and I don't have one
G
Title: Re: Mid school chain ring shim/top hat washer
Post by: Gary72 on February 13, 2014, 02:49 PM: Found one :daumenhoch:
Found I have a problem as well. I just bought a set of Profile SS cranks and it looks like the axle is 22 and a bit mm. Washer will slide onto a Primo axle but not the SS axle :'(
Gonna have to track down a SS BB.
PM your addy Gav and I'll pop it in the post.
Title: Re: Mid school chain ring shim/top hat washer
Post by: Dannywhac on February 13, 2014, 03:07 PM: Yep - SS's are 22.1mm fella - equates to 7/8". You can lightly sand out the internal side of the top-hat on a 22mm to get it to fit.
Title: Re: Mid school chain ring shim/top hat washer
Post by: Gary72 on February 13, 2014, 03:39 PM: Luckily I've got a top hat that fits, it's the BB that I haven't got, I was going to buy a Primo one off ebay, but guessing it will not fit. The cranks came with a ti axle that is 22mm. But the end bolts will not look right on my build.
Title: Re: Mid school chain ring shim/top hat washer
Post by: Dannywhac on February 13, 2014, 04:17 PM: Yep - Primo one won't fit.

Was it these one's:

http://www.ebay.co.uk/itm/Profile-Bmx-Cranks-/291060986365?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item43c49631fd&nma=true&si=RKylAoGrJFJLZVB0aRoPc4xojrE%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

Cos the end bolts on that pair are the same flush SS end bolts I got with my SS cranks back in '97.

BB wise you just want some R12-2RS bearings off eBay that are 7/8 internal and slap them into some Profile alloy American BB cups.

I've got some brand spankers new bearings if you want em.
Title: Re: Mid school chain ring shim/top hat washer
Post by: Gary72 on February 13, 2014, 08:22 PM: I got mine off Diggler, he has deleted the thread now though. I've had a set of DJ cranks in the past. Regret selling them. Are the cups the same? There is a new set for sale on ebay. Found some profile bearings in winstanleys.
Title: Re: Mid school chain ring shim/top hat washer
Post by: Dannywhac on February 13, 2014, 09:56 PM: Yeah - cups are the same for both standard and SS - only the inner ring (ooh-er etc) of the bearing's different. Gives a shout if you ever need the new uns I've got - you can have em for nowt.