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

[Rod_Saetan]

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.

 

[Woz]

Good call RS. Do you know the model name by any chance?

EDIT: These perhaps?

172.5mm x 110/74 bcd Ritchey Logic Sugino crank arms JIS

store.bicycleczar.com

 

[squirrelchaser]

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]

Thanks a lot !

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

 

[squirrelchaser]

Thanks a lot !

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

No worries . I forgot to get the chainline as I was pushed for time . (the guy with the bike is a bass player and so was 5 hours late} .

 

[Rod_Saetan]

Good call RS. Do you know the model name by any chance?

EDIT: These perhaps?

172.5mm x 110/74 bcd Ritchey Logic Sugino crank arms JIS

store.bicycleczar.com

They're the ones!

 

[hamster]

The Spa XD2 cranks work well, are insanely cheap and have a pretty narrow Q factor.

 

[mdvineng]

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

 

[pigman]

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

 

[hamster]

I've run 5 of them over the years - all have been fine, but one individual is not the whole picture.