XT FC-M730 on a Retro Tourer - someone must have done it here!

Rod_Saetan

Old School Grand Master
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For future reference the Ritchey cranks are perfect for this application - they are pretty, 110 BCD and the granny ring attaches with spacers so you can keep the already low Q factor down.
 
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squirrelchaser

Dirt Disciple
For a 730 with a 122.5mm axle in a 68mm bb shell Q factor is 150mm . On velobase it gives 117.5 and 122.5 as the axle lengths I was assuming that was to account for 68mm and 73mm shells but am in reality , ignorant . Hope it helps.
 

Woz

Senior Retro Guru
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Thanks a lot !

That's something to get my grey matter working and do some measurements !
 

mdvineng

Senior Retro Guru
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I did it back in the early 90's using 735 mechs, MT60 triple and a UN73 113 bb on my Frank Herety.
 
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pigman

Senior Retro Guru
The Spa XD2 cranks work well, are insanely cheap and have a pretty narrow Q factor.
One or 2 reports in another thread on here recently suggesting Spa cranks may have quality issues. I'm not going to diss spa as a shop, but some of their own-label budget gear may be questionable
 
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