The Bolt On Bike

Bolt On Bike - MK1
The idea for this bike arose following the purchase of an old mountain bike frame on eBay for 99 pence... for no other reason that it only cost 99 pence.  Soon after another random eBay purchase of a back wheel fitted with an 8 speed nexus hub gear, the plan to combine wheel and frame in pursuit of the ultimate commuting bike began!
I had the frame shot blasted and powder coated at Unimet Enamellers in Reading, the standard of finish was excellent and well worth the £50 cost.
Fortunately the frame had plenty of clearance at the rear to fit the 700c wheel and also had a bridge on the seat stays to take a pivot mount calliper brake.  I had a spare pair of eXotic 29er forks with an uncut steerer which were fitted in conjunction with a stronglight headset.  I built the front wheel with a Shimano DH-3N30  hub dynamo and Rigida Sputnik Rim.
The biggest challenge came in choosing the right combination of bottom bracket chainset and rear sprocket to produce a straight chainline. Fitting a single chainset to this mountain bike frame was problematic in that there was no clearance at the chainstay for a chaining ring of anything bigger than around 34 teeth.  Using a combination of a dished Sturmey Archer rear sprocket (18T( and a modified Stronglight ST 55 (38T) chainset I was able to achieve the desired gear range of 90 to 30 inches and a straight chainline.... to be continued

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