Sugino crank help
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Sugino crank help
Postby Cooker » Thu Sep 29, 2011 9:37 am
The front chain wheels are a 52 and I think 48 or 49.
I think it's a Sugino Mighty but unsure.
I would like to change the small chain ring to a lower ratio then it's current high ratio of 48 or 49 to something around a 40 or 39.
I can't seem to find a wheel to buy, am I able to change the wheel?
http://m935.photobucket.com/albumview/a ... PxkQ%3D%3D
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Re: Sugino crank help
Postby HappyHumber » Thu Sep 29, 2011 10:11 am
Read up about BCDs and how to measure your crank and know which size chain ring to buy here
Seems a little odd that your existing chain rings are so close together in size - normally there's at least a 10 tooth difference. eg 52/42, 53/39 etc... etc. though this can depend on the age of the bike and the original ratio combinations with the rear cassette/cluster though.
Hit me up via the BNA dm; I'll get an alert. If y'know, you know.
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Re: Sugino crank help
Postby Cooker » Thu Sep 29, 2011 10:31 am
The link in first post shows my bike with the crank.
Can't find any on eBay for my bcd.
It's quite large.
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Re: Sugino crank help
Postby HappyHumber » Thu Sep 29, 2011 11:10 am
It's not really the best photo for guaging by eye what you have. Odds are it's a 130mm.. or possibly if it's an older 70s road double maybe 144bcd. If the latter is the case.. you'll probably be limited to track chainrings in this day & age, which are meant for 1/8" chains - not multi-speed 3/32" geared set ups.
144 as a road (geared) BCD died out back when rear clusters were no more than 5 (or 6?) cogs at the back... but there are still a number of these 144 doubles (i.e. two chain ring) around.
Hit me up via the BNA dm; I'll get an alert. If y'know, you know.
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Re: Sugino crank help
Postby darkhorse75 » Thu Sep 29, 2011 11:17 am
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Re: Sugino crank help
Postby Cooker » Thu Sep 29, 2011 1:16 pm
I've either got a 144 or 151 bcd.
I'll check tonight.
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Re: Sugino crank help
Postby Cooker » Thu Sep 29, 2011 7:50 pm
I cant find an inner 44t chain ring for my bike.
Can anyone help out?
Thanks
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Re: Sugino crank help
Postby HappyHumber » Fri Sep 30, 2011 1:49 am
Probably just easier to swap your crankset for something more common.... Fish around on the market place.. should be able to get something suitable second hand.
Hit me up via the BNA dm; I'll get an alert. If y'know, you know.
- foo on patrol
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Re: Sugino crank help
Postby foo on patrol » Fri Sep 30, 2011 2:26 pm
I have rings for the Sugino cranks from the 70s (2 sizes) and these used to fit campy, shimano and galli cranks from the era.
They changed the star size in the late 70s and I have the later crank size but still have some rings, from the earlier crank size but not the crank arms as I
sold these on a bike many moons ago.
Foo
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Re: Sugino crank help
Postby Cooker » Fri Sep 30, 2011 3:08 pm
If your holes measure 84.6 then it's 144bcd
If it's 88.7 then it's 151 bcd
- foo on patrol
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Re: Sugino crank help
Postby foo on patrol » Fri Sep 30, 2011 3:31 pm
The later ones are 144 then and the earlier are 151.
Foo
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Re: Sugino crank help
Postby Cooker » Fri Sep 30, 2011 3:56 pm
Lower then 48?
I might be interested to buy of you.
Cheers
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Re: Sugino crank help
Postby HappyHumber » Fri Sep 30, 2011 4:20 pm
The smaller the BCD, the lower the minimum tooth count. Physically there's no limit to the max tooth count (not taking into account frame clearances against the chainstays etc) but you lose rigidity as the crank spider gets smaller in relation to the larger chainring.
Hit me up via the BNA dm; I'll get an alert. If y'know, you know.
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Re: Sugino crank help
Postby HappyHumber » Fri Sep 30, 2011 4:34 pm
Hit me up via the BNA dm; I'll get an alert. If y'know, you know.
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Sugino crank help
Postby singlespeedscott » Fri Sep 30, 2011 4:41 pm
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Re: Sugino crank help
Postby foo on patrol » Fri Sep 30, 2011 4:52 pm
I am trying to find them at the moment Cooker as I have just moved house in the last couple of months!Cooker wrote:How many teeth are your 151 ones?
Lower then 48?
I might be interested to buy of you.
Cheers
When I locate them I will let you know the sizes.
Foo
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Re: Sugino crank help
Postby HappyHumber » Fri Sep 30, 2011 5:03 pm
no more than 25% or so the price of a new ring I reckon.... Entirely your call thoughHappyHumber wrote:I'd be dubious about buying an old second hand ring for any LARGE sum of money....
Hit me up via the BNA dm; I'll get an alert. If y'know, you know.
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Re: Sugino crank help
Postby Cooker » Fri Sep 30, 2011 6:30 pm
My crank has 2 rings, 48/53.
I want an inner ring less then 48 and all the 151 rings I have found are for single speed that doesn't recquire changing gear.
Are yours inners?
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Re: Sugino crank help
Postby foo on patrol » Fri Sep 30, 2011 6:46 pm
Foo
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Re: Sugino crank help
Postby foo on patrol » Tue Oct 04, 2011 7:16 pm
I went to all 3/32 in the 144 and interchanged with my road bike.
Foo
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