Shimano Crank, Gen 1 speedconcept 7?

Triathlon Forum
1

I believe the bike is Stock with BB86, Will a shimano crank fit in this?

2

I believe the bike is Stock with BB86, Will a shimano crank fit in this?

It depends on what bearing are installed. It may have the bearings for a Shimano i.e. 24mm crank or it could have bearings for a GXP crank like the Sram uses which is slightly different.

Hugh

3

shimano makes a bb86.5 bottom bracket adapter (sm-bb72-41 I think) that you’ll need as opposed to the pressed in cups.

You’ll need that, but otherwise yes works fine.

4

as others mentioned, with the right BB86 BB kit you’ll be able to run a Shimano crank in that bike. the Trek PNs I have for that are 518555 (Shimano part ISMBB7141B ) and 527081 (Shimano part BBRS500PB).

5

It used BB86 and not BB90?

6

SC 7’s use BB86 while SC 9’s use BB90. They both end up fitting the same cranks as long as the same bearing kits are used.

7

for some reason (Carl?) the 7 series used 86 and the 9 series used 90.To make things interesting years later when people want to know what size their bb is I assume :wink:
.

8

actually, it’s about price points. press-fit systems are considerably cheaper & easier to provide for in frame manufacturing than as-molded bearing cups.

ETA: to clarify it’s about the frame mfg

9

as others mentioned, with the right BB86 BB kit you’ll be able to run a Shimano crank in that bike. the Trek PNs I have for that are 518555 (Shimano part ISMBB7141B ) and 527081 (Shimano part BBRS500PB).

Carl do i need both parts or Either will work?

10

Either should work.