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Dolan Bikes DR1 Bike Frame: Custom Bottom Bracket
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Dolan Bikes DR1 Bike Frame: Custom Bottom Bracket

The British company Dolan (based near Ormskirk in Lancashire, England) have been famous for supplying bikes to many household names over the years and specifically in the field of track cycling. In the late nineties, they started to import frames from the far east. A Dolan DR1 bike frame was initially brought in to Mapdec…

ENGWE Engine Pro Folding Fat E-Bike (250W/750W)
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ENGWE Engine Pro Folding Fat E-Bike (250W/750W)

Introduction This is a review of the ENGWE folding fat bike. It is an aluminium bodied fat bike that is manufactured in China. It is available through the website Banggood. For UK readers, the bike may be available on a participating employer’s cycle to work scheme – it will depend on how it is administered….

Shimano Crankset Failures: An Engineering Analysis
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Shimano Crankset Failures: An Engineering Analysis

Introduction Shimano have had some issues with their high end cranksets in recent times. It seems as though the Ultegra and Dura Ace cranksets are the primary units affected. There have been many reports of the cranksets fracturing in half. Some of these have been under modest load on turbo trainers whilst others have been…

Hambini Bottom Brackets get roasted: Bottom Bracket Review and Quality Control
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Hambini Bottom Brackets get roasted: Bottom Bracket Review and Quality Control

This video uploaded by youtuber Peak Torque shows a Hambini BB having it’s engineering tolerances judged. Some key points It’s a BB86 Shimano Racing Edition Bottom Bracket The bottom bracket tolerances are accurate to 0.005mm, that is less than the diameter of a human sperm cell. The eccentricity was found to be 0.010mm (0.0005inch), the…

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