Quote:
Originally Posted by Neil K Walk
The tech quoted me $380 to overhaul the crankshaft on my (2003) Trek 4900. I paid close to $600 back then but I expect that depreciation is going to devalue it down to less than $100, making an overhaul costing 4x as much not a very cost effective decision.
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What sort of cranks would that be? There's a wide range of parts that will fit, and the work is pretty simple and quick if you have the right tools.
For rolling resistance, tyres are one big thing, and suitable pressure is essential.
You mentioned seat height.
Appropriate leg extension is the measure there. I get into the ballpark like this:
- pedal the bike with my heels on the pedals
- raise seat until I can barely do it withOUT rocking my hips
- if I need to rock my hips to pedal, lower the seat.
-> now, when I pedal correctly with the ball of the foot on the pedal. I have a little bend left in my knee, at the bottom of the stroke.