K2 / Proflex Riders Group

General => Tech Forum => Topic started by: lokomonkey on April 19, 2004, 12:29:56 pm

Title: bottom bracket height ??
Post by: lokomonkey on April 19, 2004, 12:29:56 pm

I know it's been said, but I couldnt find it, :-[ anybody knows the correct bottom bracket height in a disco monkey? for some trail riding and light freeride, but tons of FUNRIDING!! yeah baby!!

Title: Re: bottom bracket height ??
Post by: Matno on April 19, 2004, 03:48:49 pm

320mm or 12.6". Almost a full inch higher than my 98 5000 (298mm or 11.73"). Interesting. I've never thought of my bike as having a low bottom bracket. Compared to other bikes I've ridden recently, the C'dale Jekyll was low enough to constantly bash the cranks on just about everything (but it's adjustable and that was the lowest setting) and the Trek Liquid felt taller (but that's subjective, I don't know for sure).

Seems to me like BB height would also be influenced somewhat by tire size, and of course, a different shock length could raise or lower it slightly.

For all measurements: http://www.geocities.com/k2bike_files/k2geom.html

Title: Re: bottom bracket height ??
Post by: oyanta on April 20, 2004, 09:01:53 am

thats funny I just mesure mine and it gives 13.3" and Im riding a 24" wheel, plus a 7.875" shock, that is whith a fully extended psylo sl, does it make ANY sence?? Im trying to get a sherman firefly, wich is not MUCH longer, but that would bring theBB even higher. is there a 'special' way to mesure the BB height??

Title: Re: bottom bracket height ??
Post by: Matno on April 20, 2004, 01:14:28 pm

I may be wrong, but I'm pretty sure most manufacturers measure bottom bracket height based on the recommended amount of sag. In other words, you should measure it when your weight is on the bike (assuming you have the preload/sag set to recommended specs).