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FUJI Transonic One.1: Engineering Roast
The FUJI Bikes Transonic ONE.1 came in for an engineering roast. This wasn’t the worst that has ever come into Hambini HQ.
NTN
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.
Yoeleo R11 Undersized Bottom Bracket fixed
Here is a video posted by The Unabiker on YouTube. In it he describes some of the problems he had with his Yoeleo frame and specifically trying to fit a Hambini Bottom Bracket into it. Yoeleo have historically had decent tolerances but it shows that nobody is immune. The check to get it fixed and…
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.
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…
Ceramic Bearings vs Steel Bearings: An Engineering Analysis
One of the most controversial topics in the cycling industry is with regards the topic of Ceramic bearings and whether they do or do not reduce friction dramatically in riding. This article will address some of the concerns and topics associated with this debate and quantify the numbers. Internal Bearing construction – Ceramic bearings are…
Pressfit vs Threaded Bottom Brackets
There are various camps out there on the internet that swear by threaded bottom brackets as a means to avoid creaking. This video below shows the pro’s and con’s of both.
Warning: Counterfeit/B Grade SKF and NTN bearings
Introduction I have had a number of cyclists contact me with issues around NTN and SKF bearings being fitted at bike shops and failing within a fairly short period of time. A number of these cyclists have sent me the bearings back to look at and I have found a large number of bearings to…
Bottom Bracket Pressfit and Creaking, an Engineering Analysis
If you are reading this you will have probably already come across the numerous posts by various individuals in Internet forums across the web. The issue of creaking bottom brackets has been blamed on the introduction of pressfit and directfit bottom bracket standards, where bearings either push directly into the bike frame or push into…
Testing to Find the Fastest Bicycle Wheel Hubs
The aerodynamic performance of wheels often grabs the headlines and the marketing budget but the reality is the hubs and the bearings within them will have more of a performance differential for the average cyclist. As an example, the power differential between wheels of an equivalent depth at speeds of less than 35km/h will only…
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