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Technical & Reference Section => Tech and Restoration => Topic started by: gary4130 on November 27, 2008, 10:44 PM

Title: smallest chainring onto an old school spider
Post by: gary4130 on November 27, 2008, 10:44 PM: does anybody know what the smallest size chainring that would fit onto a spider ? and does it need to be a particular size ,have seen a few on e-bay for road bikes, would these stiil fit?
Title: Re: smallest chainring onto an old school spider
Post by: Mattdub on November 28, 2008, 09:14 AM: 39 tooth was used on cruisers bitd ;)
Title: Re: smallest chainring onto an old school spider
Post by: HEYWOOD BMX on November 28, 2008, 12:36 PM: :) Check that the bolt holes match up with the spider.Most BMX stuff is 110 BCD,road/MTB is often 104 BCD?
Title: Re: smallest chainring onto an old school spider
Post by: Gary72 on November 28, 2008, 01:23 PM: 39 will fit on, but no lower as the arms are right next to the chain on a 39. run it with 14
Title: Re: smallest chainring onto an old school spider
Post by: bobafett on November 28, 2008, 01:28 PM: Quote from: HEYWOOD BMX on November 28, 2008, 12:36 PM
:) Check that the bolt holes match up with the spider.Most BMX stuff is 110 BCD,road/MTB is often 104 BCD?

And even then it depends what spider you've got - I know takagi / tioga spider's can't be used with the likes of a sugino ring (unless it's the slotted hole version of the spider) bloody mine field >:(
Title: Re: smallest chainring onto an old school spider
Post by: HEYWOOD BMX on November 28, 2008, 03:18 PM: MCS do a 34t/5 hole sprocket....
Title: Re: smallest chainring onto an old school spider
Post by: gary4130 on November 28, 2008, 07:08 PM: Quote from: HEYWOOD BMX on November 28, 2008, 03:18 PM
MCS do a 34t/5 hole sprocket....
yeah thats the one i saw was going to go for a 35 or 36 t 'ring ,but didnt want to shell out £13 if doesnt fit ,but says bmx so might be ok
Title: Re: smallest chainring onto an old school spider
Post by: gary4130 on November 28, 2008, 07:11 PM: Quote from: Gary72 on November 28, 2008, 01:23 PM
39 will fit on, but no lower as the arms are right next to the chain on a 39. run it with 14
cheers gary ,have already 39/14 but wanted to go smaller if poss ,35/13 or 36/13 i think might be the lowest that will fit
Title: Re: smallest chainring onto an old school spider
Post by: gary4130 on December 23, 2008, 08:00 PM: got a 34t 110 bcd off the bay and fits on the spider no probs and the chain clearance is ok,thanks to all for your help . :daumenhoch:
the grearing at the mo is 34/13 which is about equal to 42/16 so its not too bad,just need to find a 35 or 36 now.