then one in there currently is not the right one as I took it out to clean/regrease and all the cups & balls are loose, not in an actual bearing race.
2007-09-26 06:58:16 · 2 answers · asked by ? 3 in Sports ➔ Cycling
Measuring bottom brackets is more art than science in my experience. I don't doubt that it can be done, but I was glad to find a sealed version at about GBP£20 a couple of years ago. It was available with different lengths to suit various set-ups and even the bike shop had to experiment to get it right.
Have a look at the UK CTC article "Bottom-bracket confusion – 2004.07" which is about half way down the page I've bookmarked.
2007-09-30 05:25:06 · answer #1 · answered by Phillip B 6 · 0⤊ 0⤋
It depends on the manufacturer - Some measure from the center of the bottom bracket to the "Top" of the seat tube - others measure from the center of the bottom bracket to the center point where the toptube crosses the seat tube... And some even get more confusing by measuring to the top of the top tube..? I find the more critical fit on a road bike to be cockpit length ~ so don't worry about too much/too little stand over, if the cockpit is too short or too long, you won't be comfortable. Furthermore, in most cases, a frame can be more accurately described by measuring the top tube length - Center of Head Tube & Top tube to the center of the seat tube & top tube junction. Mountain Bikes are different - They are measured by the seat tube length, there is little consideration for cockpit length, some like a Mountain bike to fit a size smaller, to be more flickable on the trail. I hope this helps you out!
2016-05-19 01:15:11 · answer #2 · answered by ? 3 · 0⤊ 0⤋