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PostPosted: Mon Nov 23, 2020 1:43 pm 
Dirt Disciple

Joined: Tue Jul 14, 2020 6:44 am
Posts: 66
Wish I could fit more in the subject line...

To be clearer, I'm wondering about mixing modernish 10spd 105 (5700) with an older style compact on a square taper compact with say a 28/ 46 for instance. Something like the French manufacturers used to make or (but this is out of my price range) René Herse/ Compass do make?

I currently have a full 105 groupset, but feel limited by it for the riding I want to do, which includes less than perfect lanes, rough stuff and future light touring and audax. I've got a lot fitter since March, but sometimes the current set up, 50 / 34 crankset with a 14- 30 block isn't quite enough. Basically I would like to be able to run lower gears without losing Brifters, chain, mechs and cassette.

Frame is a late 90s Roberts Clubman.

What chainrings would be compatible, would I need to get something 10 spd specific? Would it be possible to adjust the front mech to work with this combination?

I can see myself eventually losing Brifters completely and going to bar end (possibly downtube) shifters and possibly getting a triple. The eventual aim is to replace the Roberts with 650b frame, but that's a long way off right now.

Happy to be told what will/ won't work, just intrested on how I can adapt what I have to fit closer to what I want?


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PostPosted: Mon Nov 23, 2020 4:42 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 10423
Location: New Forest, UK
I thought about the same thing, using a Stronglight 49D or 100 with an 86mm pcd setup.
There are likely to be two problems:
1 Chainring thickness - 10 speed chain is narrower inside
2 The risk of a dead-zone between rings which the super-narrow 10s chain can drop into, or at the very least ride with the chain sides sitting on the inner teeth.

Velo Orange do some 'reissue' lookalike cranks that are (IIRC) 10s compatible. Holdsworth (PlanetX) also do some, althoguh being PlanetX they may only occasionally be available.
On my son's CX bike we run a 10 speed 105 setup with a Middleburn MTB chainset as a 32/46 double. It works fine with stock 105 front mech. Other cheaper chainsets would work just as well, simply remove the inner ring, and ideally fit a shorter bottom bracket to neaten up the chainline. I hate pedalling like a duck with wide-spaced cranks.


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PostPosted: Mon Nov 23, 2020 4:50 pm 
King of the Skip Monkeys
King of the Skip Monkeys

Joined: Wed Nov 07, 2007 4:34 pm
Posts: 33012
Tadah!

Ernie Clements with 10spd indexed and old-er Stronglight

Image


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PostPosted: Mon Nov 23, 2020 5:26 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 10423
Location: New Forest, UK
And those were the stock Stronglight rings? Good to know it works.


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 Post subject: Re:
PostPosted: Mon Nov 23, 2020 5:42 pm 
Retro Guru

Joined: Wed Dec 10, 2008 9:19 am
Posts: 2848
I'm currently using dura ace 7800 10 speed kit with chainrings from the 80s - 36/48 biopace which came off a deore chainset. No problems at all. Prior to this I was using it with ultegra 6700 kit (I swapped to the 7800 cos 6700 looks black and modern)


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PostPosted: Tue Nov 24, 2020 8:10 am 
Dirt Disciple

Joined: Tue Jul 14, 2020 6:44 am
Posts: 66
So it's definitely possible then!

LeGrandFromage and Pigman, what are you running at the back?


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 Post subject: Re:
PostPosted: Tue Nov 24, 2020 2:07 pm 
Retro Guru

Joined: Wed Dec 10, 2008 9:19 am
Posts: 2848
Mine is - 9 speed shimano cassette, 10 speed campag ergo levers, 7800 dura ace gears, the Deore biopace chainrings and 10 speed kmc chain


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PostPosted: Tue Nov 24, 2020 2:37 pm 
King of the Skip Monkeys
King of the Skip Monkeys

Joined: Wed Nov 07, 2007 4:34 pm
Posts: 33012
Sram 10spd cassette, Mt60 Deore mechs, dura Ace 10spd shifters, KMC chain


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PostPosted: Tue Nov 24, 2020 8:18 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 10423
Location: New Forest, UK
LGF, what's the Q-factor like with those Stronglight cranks? I hate the 'walking like a duck' feel with wide cranks.


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PostPosted: Tue Nov 24, 2020 9:07 pm 
King of the Skip Monkeys
King of the Skip Monkeys

Joined: Wed Nov 07, 2007 4:34 pm
Posts: 33012
hamster wrote:
LGF, what's the Q-factor like with those Stronglight cranks? I hate the 'walking like a duck' feel with wide cranks.


Not a clue! Cranks were bendy, frame was small, sold it


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