XT M737 TP 28.6 & UN 72 bb's

[dendy]

Payment via pp gift preferred. Price includes postage to uk, overseas buyers please contact me for extra delivery cost.

XT M737 top pull mech in nice condition - £13 sold

UN 72 bottom brackets, were nos and only fitted and used enough to realise I needed to next size up.

1 x 68mm 107mm spindle - £14 sold
1 x 68mm 110mm spindle - £14 sold

Thanks

 

[Mossy]

1 x 68mm 110mm spindle - £14


Can I have this please? PM on the way

 

[Brother]

XT M737 top pull mech in nice condition - £13

message coming regarding mech.

 

[Anthony]

I'll take the 68/107 UN72 please - please pm me your paypal address

 

[Anthony]

Perhaps the wrong place to ask this, but as Dendy's picture illustrates the point so well, can anybody explain to me why the 68/107 and 68/110 sizes are identical on the drive side and differ by 3mm only on the non-drive side?

As Dendy may have discovered from the sound of it, the 68/107 and 68/110 give exactly the same chainline and I don't see the point of Shimano designing them like that.

 

[dendy]

Perhaps the wrong place to ask this, but as Dendy's picture illustrates the point so well, can anybody explain to me why the 68/107 and 68/110 sizes are identical on the drive side and differ by 3mm only on the non-drive side?

As Dendy may have discovered from the sound of it, the 68/107 and 68/110 give exactly the same chainline and I don't see the point of Shimano designing them like that.

I did find this out much to my annoyance Afraid i have no idea why though :?

 

[trek_y]

2nd dibs on the front mech if its still there ?

 

[Mossy]

I hope the 110mm fits my middleburn RS3 compact chainset?

 

[dendy]

2nd dibs on the front mech if its still there ?

Not received payment yet so will let you know later

 

[FluffyChicken]

Perhaps the wrong place to ask this, but as Dendy's picture illustrates the point so well, can anybody explain to me why the 68/107 and 68/110 sizes are identical on the drive side and differ by 3mm only on the non-drive side?

As Dendy may have discovered from the sound of it, the 68/107 and 68/110 give exactly the same chainline and I don't see the point of Shimano designing them like that.

I can, it's an in fill length for 107/113 the chain line of 47.5 and 50mm respectively.
It came after those lengths had been used for M900/UN90, probably as feedback from manufacturers, (from catalogue info)

Like many I always assumed it was to give a middle length, but not so, it's to give a greater none drive side clearance if needed to balance the gaps out. something like that, it also allows a greater chain-line alignment with drive side spacers and not ramming the none drive side into the stays

Internally I think it's a symmetrical bottom bracket where as the 107/113 are internally asymmetrical. (not externally though.) Would need to check that though.

If memory serves it harks back to the transfer from cup and cone lengths and shimano cartridge equivalents.