Profile's Tech Tuesday: Profile BB Tube Spacer Installation
Вставка
- Опубліковано 8 вер 2024
- For this Tech Tuesday, we'll be covering Profile tube spacer Installation for:
Profile American Bottom Brackets (:25)
Profile Outboard and Inboard Threaded Bottom Brackets (2:16)
Profile PF30, BB86 and BB92 Bottom Brackets (4:05)
Profile Mid and Spanish Bottom Brackets (4:32)
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I forgot to put the spacer tube on my cranks during installation, but since it's an "American" size bottom bracket (imprecise width), and I'm running Redline Flight cranks with pinch bolts, I left it alone. Months later, the cranks are still running perfectly with no adjustments. On another bike with 48 spline crank arms (no pinch bolts) the spacer tube is absolutely required, and after a few rides and some "settling in" and re-tightening the crank arm bolts, that bottom bracket has also been rock solid for months.
The pinch bolts on the flight cranks wont stop side load (like a bike landing sideways pedal first) from prematurely blowing the bearings out. there is a reason that spacer comes with the bottom bracket kit. It's supposed to be in there, it's not just a suggestion. Just because it works doesn't mean its right and that it wont fail prematurely.
Awesome 👍🏻👍🏻 Thanks for the demo! You guys ROCK! Keep pumping out that Profile goodness!
Thanks Rob!
“Final resting place,” no better words. I love these videos, you really get to know your product.
Thank you! Appreciate the feedback!
How do you center the spindle? Should the drive side crank bolt be tightened against the spindle first?
I have profile mtb crank set with pf30 bb and my cranks are alway coming loose after about 20 miles
Make sure you have grease on your bolts...and if so, a little bit of locktite might help.
why doesnt the drive side have a sealing cone
Good question: The cone serves two purposes.
1. It allows for proper alignment for optimum Q Factor. Two cones would offset that quite a bit.
2. It serves as an aesthetic addition instead of using the thick/thin washers.
Unfortunately, regardless of the cones, you will still get a bit of dirt build up on the bearing, BUT, that's why these bearings are sealed so that the build up will not effect the performance of the bearing.