Technical

Hambini Bottom Bracket Install: Yoeleo R12 Disc Kyro’s House
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Hambini Bottom Bracket Install: Yoeleo R12 Disc Kyro’s House

Fresh from YouTube is another Hambini Bottom bracket install. This time in a Yoeleo R12. This is a revision of the R11 bike Frame that The Unabiker had issues with and it highlights the problems of frame tolerances. The bottom bracket is made to much tighter tolerances than the frames they are pushed into.

Teardown: Campagnolo Ultra Torque Crankset Mechanics explained  in Depth
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Teardown: Campagnolo Ultra Torque Crankset Mechanics explained in Depth

Campagnolo cranksets have a reputation of being well engineered and robust but they are not without their problems and quirks. This post explains one of those in detail which surrounds the myths of the preload system, the “safety clip”, the system stiffness (or lack of it) and the involved nature of a bearing replacement. Campagnolo Ultra Torque is found on many of the upper range of Cranksets including the Super Record and Record.

SRAM GXP Cranksets: An Engineering Guide
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SRAM GXP Cranksets: An Engineering Guide

This article will cover the technical and engineering aspects of SRAM GXP. Sram GXP is a very popular crankset standard used by SRAM. It offers an industrial based bearing arrangement and was touted as having the lowest weight and rolling resistance of any crankset bottom bracket standard. The engineering will be analysed in detail. Currently…

Bike Bearing Grease: A Practical Guide to Bearings and Assembly for Bikes
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Bike Bearing Grease: A Practical Guide to Bearings and Assembly for Bikes

Introduction Grease is an often talked about but little understood. It can have a significant impact on performance on a bike specifically in the area of transmission frictional losses (watts). This guide covers the practical aspects of using grease as a lubricant and as an assembly aid. Following a number of questions arising from a…

Bicycle Wheel Power Data 50km/h
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Bicycle Wheel Power Data 50km/h

Over several years, bike wheels have been tested for aerodynamic performance. To date, this is the largest independent dataset available. Popular brands such as DT Swiss, SwissSide, Shimano, Mavic and Bontrager have all been tested. This dataset was originally derived from wind tunnel test data but has latterly moved over to Dinitriev number with a…

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