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  #1 (permalink)  
Old 06-06-2020, 01:35 PM
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Front wheel dia difference in handling

Hey guys,
Yea, I'm still lurking and compiling images and thoughts for a bike remod or build. Basic question (and sheepish for asking it) but how much of a difference is there in handling between equal sized wheels and a larger front wheel diameter? An example....



AND



I think I'm leaning toward the equal size wheels.... but...
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  #2 (permalink)  
Old 06-06-2020, 02:10 PM
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I have never experienced, but I would think that a slightly larger wheel might handle nicely.. most all of these kids toys 3 wheelers , old bicycles etc. are large front wheels, and add stability,,going smaller on the front would seem squirrely....probably best with same size for pocket book sake.
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Last edited by Shovel52; 06-06-2020 at 02:16 PM..
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Old 06-06-2020, 03:15 PM
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It’s been my experience that the width of the tire can be felt at low speeds, otherwise a bikes handling characteristics are determined mostly by rake and trail.
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Old 06-07-2020, 01:41 AM
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I believe the closer the both wheels to each other in any aspect , the better: the same size, radius, width and, indeed, the make of the tire.
Goes both ways for either thin or fat tires.

I think extreme differences is what you worry about- 300+rear and puny 90 front.


I used to have Avon 230(with 10” rim) with 120 front on my Hannibal
I rebuilt it with 300+ 180 qual radius and it leans and handles much nicer.

For the same reason I have 200+120on my chopper. and 180 +140( the biggest front I could squeeze in) on my Subzero bobber

And I love how my little bobber handles with 2 equal Coker Firestone’s


Additionally, a patch of tire contact with ground is somewhat bigger in wider tires to give the typically bigger front brakes a chance to work...
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Last edited by STEINBVG; 06-07-2020 at 01:43 AM..
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Old 06-07-2020, 09:44 AM
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Thanks guys, instinct tells me that larger diameter might feel a bit more squirrely in a slow speed turn especially if the bike has been stretched out a bit.

Steinbvg - what're the geometry numbers on that bobber? I'm closing in on shopping for a project bike or used frame for my own build and would like to settle on the geometry I like best. Something like this:
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Old 06-07-2020, 12:45 PM
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Quote:
Originally Posted by lorax View Post
Thanks guys, instinct tells me that larger diameter might feel a bit more squirrely in a slow speed turn especially if the bike has been stretched out a bit.

Steinbvg - what're the geometry numbers on that bobber? I'm closing in on shopping for a project bike or used frame for my own build and would like to settle on the geometry I like best. Something like this:
I had my bobber as rigid before . than changed to FLH frame . Still have the kraftec frame standard dimensions with a title. It looks pretty much like the one you like, with a smaller tank. It accepts the shortest repop HD springer. Zero stretch, 30 degree rake, 130 tire, no offset in drive train
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113"s&s, Walz softail 2000/2012 prostreet
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120"Ultima, Kraft Tech FL 2014/2019 bobber

Last edited by STEINBVG; 06-07-2020 at 01:26 PM..
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Old 06-08-2020, 05:01 AM
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Thanks mate. Why would you need to add offset to the drive train? Is this a common thing?
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Old 06-08-2020, 09:04 AM
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Quote:
Originally Posted by lorax View Post
Thanks mate. Why would you need to add offset to the drive train? Is this a common thing?
I believe if you try to squeeze a 150, 160 tire on this frame with chain, you will need to use an offset sprocket and might move a tranny/ primary out a bit. Although I think you can just get away with an offset tranny sprocket
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113"s&s, Walz softail 2000/2012 prostreet
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127"Ultima, Chassis Design rigid 2013 bobber
120"Ultima, Kraft Tech FL 2014/2019 bobber

Last edited by STEINBVG; 06-08-2020 at 01:07 PM..
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  #9 (permalink)  
Old 06-08-2020, 12:56 PM
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Ah - so that would be the width of the wheel? I can see how that would require an offset. Tanks!
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Old 06-09-2020, 06:54 AM
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Here ya go..This is supposed to improve the handling, I could see how. Not my style though.

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Old 06-09-2020, 12:10 PM
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Quote:
Originally Posted by Shovel52 View Post
Here ya go..This is supposed to improve the handling, I could see how. Not my style though.

Not mine either.

To me this is goes alone with The American Chopper hideousness.
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113"s&s, Walz softail 2000/2012 prostreet
96"s&s, Daytec dyna/ softail hybrid, 1998/2010 chopper
127"Ultima, Chassis Design rigid 2013 bobber
120"Ultima, Kraft Tech FL 2014/2019 bobber
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Old 06-10-2020, 05:54 AM
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Nope - not mine.

And I'm glad to hear someone else comment Paul Jr's style. Senior on the other hand seems to have more sensibility - IMHO.
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Old 06-30-2020, 06:28 AM
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the handling must be smooth after doing this and the performance increases as well.
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Old 06-30-2020, 07:50 AM
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Quote:
Originally Posted by Adam Gilly View Post
the handling must be smooth after doing this and the performance increases as well.
Which bike you,re referring to?
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SORRY FOR THE UPPER CASE. CAN'T SEE SHIT.
113"s&s, Walz softail 2000/2012 prostreet
96"s&s, Daytec dyna/ softail hybrid, 1998/2010 chopper
127"Ultima, Chassis Design rigid 2013 bobber
120"Ultima, Kraft Tech FL 2014/2019 bobber
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