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 Post subject: microdrive ?
PostPosted: Wed Oct 10, 2007 9:07 pm 
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umm forgive me for being an idiot..... but what is the diffrence between microdrive and ermm normal drive ! ? what is compatable with what or not etc .................
cheers


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 Post subject:
PostPosted: Wed Oct 10, 2007 9:23 pm 
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Microdrive is just a 11t rear sproket and smaller chainrings. Suntour wisely realised that most humans don't push 46/12 very often and would appreciate more fexibility in the mid range.

Shimano 'went microdrive' in 1995 with 22/34/44 rings and the 11t-28t block.

Suntour Microdrive is front compatible with Shimano, but it is not really rear compatible unless you are very paitient with the mix 'n match.

Campagnolo also used smaller rings on the front from about 1994.


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 Post subject:
PostPosted: Wed Oct 10, 2007 9:53 pm 
Retro Guru
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Yep,

only Shimano called their version compact drive.
The rest is the same.
Smaller chainrings, and a smaller sprocket. For reducing weight.


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 Post subject:
PostPosted: Thu Oct 11, 2007 7:33 am 
retrobike rider
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Some of the shimano microdrive have only a 38T outer. The only ones i can think of were the cheaper alivio and altus chainsets. I remember Claud Butler speccing them with a screw on rear wheel. 38T with 14T :roll: :lol:


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 Post subject:
PostPosted: Thu Oct 11, 2007 11:12 am 
Devout Dirtbag

Joined: Wed Aug 15, 2007 10:16 am
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Yeah, I remember the cheapo groups with 38t outer rings. Ridiculous....

I think 42T outer was the standard for quite a while too, but has sensibly been replaced by a 44 these days.


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 Post subject:
PostPosted: Thu Oct 11, 2007 11:23 am 
Old School Hero
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I'm sure suntour microdrive inner rings have a 2mm smaller bolt diameter, compared the shimano compact drive. I can remember middleburn RS2's coming with a chice of three spiders for a while (MTB, compact and microdrive)???


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 Post subject:
PostPosted: Thu Oct 11, 2007 11:30 am 
retrobike rider / Gold Trader
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my brother had one of those claud butlers with the 38t top ring

it was laughable. used an e-type front mech as well so you couldnt change it even if you wanted.


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 Post subject:
PostPosted: Thu Oct 11, 2007 1:48 pm 
retrobike rider / Gold Trader
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fuzzywig wrote:
I'm sure suntour microdrive inner rings have a 2mm smaller bolt diameter, compared the shimano compact drive. I can remember middleburn RS2's coming with a chice of three spiders for a while (MTB, compact and microdrive)???


Yeah, that's right. Obvously Shimano's marketing and volumes meant most people and manufacturers followed their measurements. Microdrive became a little redundant in most bike shops.
My mate is still looking for a Red microdrive granny ring for his toplines...proving rather difficult!


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 Post subject:
PostPosted: Thu Oct 11, 2007 2:54 pm 
retrobike rider
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cce wrote:
my brother had one of those claud butlers with the 38t top ring

it was laughable. used an e-type front mech as well so you couldnt change it even if you wanted.

Yeah that was the one. A colleague didn't realise and sold one for commuting with slicks on. The customer wasn't too impressed when the found out about the set up :lol:


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 Post subject:
PostPosted: Thu Oct 11, 2007 3:06 pm 
BoTM Winner / retrobike rider
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Stick Legs wrote:
Suntour Microdrive is front compatible with Shimano, but it is not really rear compatible unless you are very paitient with the mix 'n match.


If you use a suntour mech and derailleur, and a shimano cassette it'll work. :wink:


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