How hard (moreso costly) is it to put a modern drivetrain on a vintage mtb?

[retrobiker273891]

The stronglight kitted to my Spesh was 42/32/22. Plenty of those around for cheaps. Can always just replace the granny with a smaller.

What is the specific model please? Is that a new make of crankset, not vintage? Also will most newer cranksets be compatible with old frames? From what I see here: https://stronglight.com/en/categorie-produit/cranksets

Only see 24 smallest so far.

For example: https://www.sjscycles.co.uk/chainsets/sunrace-triple-chainset-with-detachable-rings-423222t-170mm/

That one is £54. Will that be compatible and is the stronglight you suggested cheaper/more easily compatible?

 

[Imlach]

Well the thing with replacing, from what I read is compatibility issues as bcd mm are all different and for the tiny 22/20t ones they ask for 64bcd which seems like only few cranksets do.

Plenty of cranksets that offer 104/64 . Just make a wanted ad. I like M569 cranks.

 

[Imlach]

The Sunrace will do the job, yes, but expensive for a tacky looking crankset. Just make a wanted ad on here and you can get something nicer for less or the equivalent.

 

[Imlach]

Of modern I've had these and they've been good and look a bit nicer

https://www.tradeinn.com/bikeinn/en...t&id_producte=4350298&country=dk&gad_source=1

 

[retrobiker273891]

The Sunrace will do the job, yes, but expensive for a tacky looking crankset. Just make a wanted ad on here and you can get something nicer for less or the equivalent.

I am fine with old but want to know what models I should look for which would be compatible for 64mm. Technical names and such.

I was not tied to the sunrace one, just the cheapest one I found that could take 64mm. So any other suggestions welcome the cheaper the better!

 

[Imlach]

Grab these. Cracking cranks

https://www.retrobike.co.uk/threads/sugino-impel-chainset.478531/
But as said, we have a wanted section. Pop in what you need and chances are some of the lovely hoarders on here have it. And more. Best way to dodge ebay prices.

 

[hamster]

That is not the common knowledge on the subject of cassettes:

https://www.mtbr.com/threads/8-speed-cassette-on-a-7-speed-hub.738283/
So are 22t old school cranksets available? The lowest I have seen is 24 so far.

All old tech and 22t and max old freewheel/cassette would probably be the path of least resistance yes? Say 22 (inner chainring)/34 (max size freewheel) x26 to give 16.8 gear inch low gear would rival most modern 1x drivetrains.

If you use an MTB 5 arm 94/58mm crank set (Shimano M563, M737 for starters) then the 58mm inner will go as low as 20T. Fit a 28 or 30T on the back and you have around a 19" gear - which is all I need on a loaded tourer on Dartmoor.

If you have a 7s hub you can fit a 9 or 10 speed cassette, just leave off the smallest sprocket and run 8-from-9 or 9-from-10. Obviously you need a matching shifter and rear derailleur (7/8/9 speed derailleurs are interchangeable, despite what Shimano may tell you). 10 speed is totally different.

 

[bikeworkshop]

10 speed is totally different.

... apart from road which is the same

 

[dablk]

For giggles, rather than suggesting as an option.. Suntour went down to 20 tooth on microdrive.

https://www.bikeforums.net/classic-...our-microdrive-mtb-drivetrain-components.html

 

[hamster]

... apart from road which is the same

I was trying to keep things simple...I could also add in SRAM and Shimergo...