No markings whatsoever on this bottom bracket by Gruenmut Bicycling Bike Bike Repair Biking Cycling Repair
Fretwork22 on February 19, 2026 7:24 pm Can’t really see it, but seems some sort of needle or tapered roller bearing and a square tapered crankset Bit like this system (but there are many different versions of the same technology I think) https://analogcycles.com/products/ta-axix-square-taper-bb-w-tool_166146
Tomac_123 on February 19, 2026 7:28 pm What frame is that? Looks very interesting indeed. Is the crank arm integrated with the spindle or is it a regular square taper crank?
3 Comments
Interesting!
Can’t really see it, but seems some sort of needle or tapered roller bearing and a square tapered crankset
Bit like this system (but there are many different versions of the same technology I think)
https://analogcycles.com/products/ta-axix-square-taper-bb-w-tool_166146
What frame is that? Looks very interesting indeed. Is the crank arm integrated with the spindle or is it a regular square taper crank?