Tornado
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- Joined
- Dec 5, 2017
- Messages
- 4,568
With the mudguard off for other work, decided to have a go at my droopy rear hoop. Noted the underside of mudguard was showing signs of tire rubbing.
Design requirements were to not require lashing bike down to floor since I do not have any lift or tie down points etc.
Pics worth a thousand words:
Was concerned how much force would be necessary and had a backup plan to place a bottle or scissor jack under the long stud and lift it up against the clamped section. But the nuts and thread did it easily. The hoop was roughly 28" from floor level at the rear most point beforehand. Was easily able to raise this a full 1 1/2" with a good sized Cresent wrench. No need to hold thread from turning etc. Releasing the tension gave a small rebound on the frame, ended up at roughly 29" off floor at rear most point, Dead even at each side and dead to nuts level with rest of frame, no more visible bend just rear of shock gussets.
Parts list:
8'x2"x4" lumber
4'x5/8" All Thread
4x 5/8" Nuts
4x 5/8" Washers
3' x 3mm Spectra high tensile strength line (1200 lbs SWL)
The line is wrapped 4x around 2x4 and frame spine...so that's easily 4000-5000 lbs load capacity.
Hope this helps someone else out.
Design requirements were to not require lashing bike down to floor since I do not have any lift or tie down points etc.
Pics worth a thousand words:
Was concerned how much force would be necessary and had a backup plan to place a bottle or scissor jack under the long stud and lift it up against the clamped section. But the nuts and thread did it easily. The hoop was roughly 28" from floor level at the rear most point beforehand. Was easily able to raise this a full 1 1/2" with a good sized Cresent wrench. No need to hold thread from turning etc. Releasing the tension gave a small rebound on the frame, ended up at roughly 29" off floor at rear most point, Dead even at each side and dead to nuts level with rest of frame, no more visible bend just rear of shock gussets.
Parts list:
8'x2"x4" lumber
4'x5/8" All Thread
4x 5/8" Nuts
4x 5/8" Washers
3' x 3mm Spectra high tensile strength line (1200 lbs SWL)
The line is wrapped 4x around 2x4 and frame spine...so that's easily 4000-5000 lbs load capacity.
Hope this helps someone else out.