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 […]
If you are about to buy a Cervelo bike, watch this video. It shows the appalling tolerances the bike frames are made to. The bottom bracket pressfit specification is so bad, neither NTN or SKF will warranty their bearings in it. This particular frame had misalignment between the two halves of the frame body.
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.
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 […]
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 […]
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 […]
Those of you who are avid viewers of a number of Internet forums will have noted that some results from my bike wheel wind tunnel testing have been contested and criticized. The ultimate result was I ended up getting banned from weightweenies for a week for calling Tom Anhalt of bike blather a spec of […]
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 […]
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 […]