Warning: Fake Loctite Products

Posted on 3 Comments
20200703 134404 scaled

One of my viewers contacted me about an issue he was having with the installation of a set of NTN bearings. He purchased what he believed to be Loctite 641 from an online supplier, this was promptly delivered with a label indicating it to be “high strength”. This is incorrect as high strength Loctite is […]

Warning: Counterfeit/B Grade SKF and NTN bearings

Posted on 3 Comments
Ntn fake real 1

Table of Contents IntroductionCounterfeit BearingsB-Grade BearingsSpotting a Fake bearingConclusions 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 […]

Specialized OSBB – Engineering Guide

Posted on 8 Comments
OSBBShell

Table of Contents Introduction46 x 61mm OSBB Road Applications42 x 68mm OSBB Road Applications42 x 73mm OSBB MTB ApplicationsCranksets and OSBB Introduction A question that crops up frequently is with regards to Specialized’s OSBB bottom bracket and what size it is exactly. The short answer is OSBB comes in 3 variants which are all called […]

Bottom Bracket Pressfit and Creaking, an Engineering Analysis

Posted on 6 Comments
angularmisalignment

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

Posted on 17 Comments

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 […]

BB86/BB92 Bottom Brackets with a 30mm or SRAM DUB Crankset – A recipe for disaster

Posted on 20 Comments
fsagossamer2 scaled

Table of Contents 30mm cranks into BB86 bike frames – Avoid if you can…Method 1 – Modified 6806 bearingMethod 2 – Use 6706 bearings or a Double row bearingPerformanceConclusion 30mm cranks into BB86 bike frames – Avoid if you can… A common question I am often emailed about is asking if I can supply a […]