rogermo
11-25-03, 06:15 PM
How can I change the trail on an EZ-1 recumbent, like Mark Stonich did on the EZ-1 he did. I have never tried to modify any part pf a bent. Thanks Roger
Bicycle Mechanics - trail
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BikerRyan
11-26-03, 05:40 PM
rogermo,
You are going to have to re-post in non-bent terms. We wedgie riders do not know what you are talking about.
-Ryan
You are going to have to re-post in non-bent terms. We wedgie riders do not know what you are talking about.
-Ryan
Wilbur Bud
11-06-06, 11:00 AM
Well, an old post without answer . . . but I am shopping for recumbents right now and I judge I am sensitive to the amount of trail in terms of how easily I can hop on and ride. Any trivia buffs out there that know of a tabluation of trail vs make and model? So far I've ridden a Slipstream, a Vision R-40, a Burley Canto, an Infinity, and a RANS V-Rex.
In answer to the reply/question, I am understanding trail is the horizontal distance at road level back from the steering axis (projected through headtube) to the actual point of contact of the tire (assumed to be a vertical drop down from the wheel hub axis). There may be some slight difference between theoretical and actual, I'm too new to say.
Famous written definition at: http://www.sheldonbrown.com/gloss_tp-z.html under t-r-a-i-l
Nice picture definition at: http://www.calfeedesign.com/frontendterms.htm
On-line calculator if you have the numbers for your machine at: http://www.recumbents.com/wisil/trail.asp
Hope I'm not upsetting anyone by including/excluding links, those are just links I arrived at while searching it out myself awhile back. I'm sure there are others.
If you have a LWB/USS at home, how about taking a straightedge out there and reporting back with your estimate for me?
In answer to the reply/question, I am understanding trail is the horizontal distance at road level back from the steering axis (projected through headtube) to the actual point of contact of the tire (assumed to be a vertical drop down from the wheel hub axis). There may be some slight difference between theoretical and actual, I'm too new to say.
Famous written definition at: http://www.sheldonbrown.com/gloss_tp-z.html under t-r-a-i-l
Nice picture definition at: http://www.calfeedesign.com/frontendterms.htm
On-line calculator if you have the numbers for your machine at: http://www.recumbents.com/wisil/trail.asp
Hope I'm not upsetting anyone by including/excluding links, those are just links I arrived at while searching it out myself awhile back. I'm sure there are others.
If you have a LWB/USS at home, how about taking a straightedge out there and reporting back with your estimate for me?
Al1943
11-06-06, 12:13 PM
To increase trail you'll need to reduce the head tube angle, usually not practical, or reduce the fork rake offset by replacing the fork.
Al
Al
Wilbur Bud
11-06-06, 08:57 PM
So maybe, just as an experiment, you could twist the fork around 180 and ride for awhile and see if it was better or worse, mentally adjusting for the ride effects of the change in height. But probably non-sensical unless the original trail was in the 0-1 inch range or your fork was really straight. Assuming you have a steering lug on each side is probably too much to hope for on a USS?