[nnamssorxela]

Howdy,

My current bottom bracket (howitzer I believe) is on it's way out. I want something that will last and I don't mind paying a little extra for it. If it is just going to poop out on me after a couple of rides or a year or so though, I don't want to pay a lot for it. My problem is that my research shows that the truvativ crank/bottom bracket design is different than all of the other ISIS designs and will only accept a truvativ bottom bracket. Is this correct? Other research and experience shows that that Truvativ bearings don't work so well. Are there any other options out there that are made by a third party? The nicest "truvativ DH gigapipe" bb has terrible reviews as well. What should I buy/do?

Thanks,
-Alex

 

[HAB]

You're boned. You're stuck with a Howitzer BB with those cranks.

 

[nnamssorxela]

Thanks for the info. I determined that is what I'm sticking with. Waiting for the new sprocket to measure some stuff. What is the third number in the bottom bracket sizing, and do I need to remove all of the shims before I measure for it?
-Alex

 

[HAB]

There are usually only 2 numbers, unless they listed the thread pitch, which is standardized on modern mountain bikes. Can I get an example of what you're talking about?

 

[nnamssorxela]

The drop down list of options for the bottom bracket I want are:
68/73 x 50mm
68/73 x 51mm
68/73 x 56mm

 

[HAB]

Oh, ok. the 68/73 means it'll work on either 68 or 73mm shells. The last number is the spindle length. Just measure your old one.

 

[PepperJester]

pretty sure thats chain line. Spindle length would be more like 113-120 would it not?

 

[HAB]

pretty sure thats chain line. Spindle length would be more like 113-120 would it not?

Yes. I'm not quite with it today.

 

[nnamssorxela]

Will the stock one have this measurement on it? When I eyeballed my chain line with the new sprocket it looked pretty close, but if I could manage to move it a millimeter or less in the correct direction it would be about perfect.

 

[HAB]

Yeah, it should.

 

[OffCamber]

This is what I did on my DJ bike after my second Truvativ BB. Very happy I did. $99
http://www.pricepoint.com/detail/13968-100_RACEB5-3-Parts-56-Cranks/Bolts/Race-Face-Evolve-DH-X-Type-Crankset-22_32_Bash.htm

 

[4130biker]

If you have 68/73 bb, how about some stylos? I've had great luck with mine. 200 w gear and ride hard, put bike away wet a lot here in the NW.
I've seen 'em for around $100. Good cranks, and you'll save a lot of weight.

 

[spacemanspiff06]

i would not spend another dime on any tapered crankset design: ISIS, octalink, BB30, or whatever but that's just me. shimano (and pinch-bolt FSAs) are where it's at. run the truvativs to the ground and get a deore for $90ish, then enjoy peace of mind.