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Old 06-21-2014, 12:24 AM
Theon Theon is offline
Motorized Bicycle Elite Member
Join Date: Jan 2014
Location: FNQ Australia
Posts: 1,440
Default Re: Dual Suspension 'Roo'

I got something mocked up,
Gives me an idea of the perfect frame dimensions, I saw a steel frame Trek when I went to the city, and looks as though it might work, at least now I have a definite ideal.
I tested the suspension travel on the rear, and with the cranks dropped 70mm from highest possible position, 320mm down to 250mm I got a bit over 40mm of spring compression, and so an effective rear suspension travel of around 6" with around 2" off spring compression.
This mock up has also given me a good idea of what top tube angle I'm looking for, as that will affect the rake, this Apollo frame had a fairly horizontal top frame which has messed with my rake. I hope I can find the right frame for it,
It appears to me the swing arm mount needs to be lifted relative to the motor by a little for perfect chain tension with rider weight, but it's pretty close.
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