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Shoeman
09-09-2016, 01:03 PM
Recently purchased a Dura Ace Crankset, it requires a 68x112mm BB. Will a 68x113 work with this Crankset, as the 68x112 are harder to find. I have in mind a BB-un55 in a 68x113 replacement or would the 68x110 be better.
Thanks
EricEstlund
09-09-2016, 01:07 PM
113 is only a .5mm difference per side. Wider is generally better(within reason) as you can avoid some potential frame interference issues.
tuscanyswe
09-09-2016, 01:08 PM
Yes it will work and u would not be able to tell a difference.
Crank would sit .5 mm further out from frame on each side.

110 would likely also work. Crank would then sit 1mm closer to the frame on each side compared to the 112 bb.
tv_vt
09-09-2016, 01:16 PM
What DA crank is that? I recall the 7700 series used a 109.5mm spindle BB.
Shoeman
09-09-2016, 01:37 PM
what da crank is that? I recall the 7700 series used a 109.5mm spindle bb.

fc-7400
Black Dog
09-09-2016, 02:25 PM
fc-7400

I think that it uses a symmetrical BB and you should be fine. I have one at home and can check unless sone here knows for sure.
icepick_trotsky
09-09-2016, 02:34 PM
Get the 112. You'll never know the difference. Remember it's only half of a millimeter per side.
oldpotatoe
09-09-2016, 05:29 PM
fc-7400

Thought 7400 BSC was 113mm and far superior Italian threading...one was 115mm.
ultraman6970
09-09-2016, 05:55 PM
Depending on the bike probably even a 109 will work aswell. Looks like a lot in paper but 109 is like 1.5 mm deeper at each side.

Remember the old 105sc cranksets, those came like with a 116 or 118 BB axle, those worked even better with a dura ace 112.
Shoeman
09-09-2016, 07:33 PM
Thought 7400 BSC was 113mm and far superior Italian threading...one was 115mm.

BB-7400/02 BSC was 68x112 The other Guys were 70x113
BB-7403 BSC was 68x103 The other Guys 70x103
11.4
09-09-2016, 09:17 PM
Thought 7400 BSC was 113mm and far superior Italian threading...one was 115mm.

And the best this guy could do was OldPotatoe? ErnestoCannelloni might be a better name for him.
oldpotatoe
09-10-2016, 05:45 AM
BB-7400/02 BSC was 68x112 The other Guys were 70x113
BB-7403 BSC was 68x103 The other Guys 70x103

7410 was 103..si? geez, this was like 20years ago..EnestoCanniloni..funny..

VecchiaPatata..ayup! How do I change my name?