9 spd shifters and 10 spd front/rear mechs and cassette

Phideaux

This may sound like a daft question but I'm building my first bike from S/H parts (because it's all I can afford) and I need some basic advice about what will work with what.

Desired outcome - 18 speed Audax type bike (but not for competition)

Purchased so far
Kinesis Racelight T frame
Ultegra 53/39 crank
105 9x2 STi levers

Will they fit:
105 or Ultegra 10 speed front and rear dérailleurs
105 or Ultegra 10 speed cassettes (yes, I realise that only 9 of the 10 speeds are likely to work).



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Mister W

9 speed shifters won't work with a 10 speed cassette. The spacing is different.

Phideaux

Mister W wrote:

9 speed shifters won't work with a 10 speed cassette. The spacing is different.

That's interesting and useful to know because it also means that I have to get a 9 speed freewheel hub as 10 speed cassettes will fit a 9 speed but not the other way round (according to Zinn).

So I can now delete all of those 10 speed items I'm watching on eBay

Cheers for that.

andy_wrx

There are some wheels with a 'Shimano 10sp only' freehub, mainly Ultegra and Dura Ace wheels with an aluminium freehub body.
But most wheels which are sold to fit Shimano will take, 8, 9 or 10sp cassettes.

See what Sheldon says, rather than Zinn
http://www.sheldonbrown.com/dura-ace.html#10


Because you have 9sp shifters, you'll need a 9sp cassette, but this can be any 9sp - 105, Tiagra, whatever as long as it's Shimano 9sp

You can use 8sp, 9sp or 10sp front & rear mechs and chainset