I have seen a few homemade rollers scattered on the internet, and while many look simple - the feat of attaining a perfect center to the press-fit bearings seems difficult to say the least.
Most of the tutorials are usually followed up with numerous retorts of why not just by a cheap set of factory rollers... that might be a solution.
Alternatively, in the DIY and poverty spirit, I found these after some searching.
Surplus Center - 1.9" X 29.5 STEEL ROLLER WITH DRIVE GROOVE
The do have some width (29") - but for someone who has never rode rollers that might be a good thing.
The fact that they already have a grove for the needed mid-to-front drive belt is certainly appealing. Also, the aspect that their rubber coated is nice. Might that lend to minimizing tire wear?
One concern is their diameter. From what I gather, the smaller the dia. of the roller - the higher the rolling resistance. In the case of 'training' this might be good no?
Out of a bare bones plan, all that would be needed is three of these, an appropriate length belt, and two 2x4's (or something fold-able and 'fancier' if need be). Total cost could realistically be kept below $40 easy.
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Thread: homebrew rollers?
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