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Old 02-13-2005, 10:06 PM   #1 (permalink)
Cabo Wabo '06
 
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FXD Tire size?

Got a few questions if ya can help.

1. Can someone tell me, what is the widest tire that can go on a '01 Dyna front wheel-19' 13 spoke ? I've got the mid glide conversion, so fat should fit. I'll remove the fender if need be.

2. If I go with a 16" front wheel, what will the drop on the front end be, basically 1 1/2 " depending on tire height?

3 .How does a fat tire, like a 150 on the front effect handling, ride?

Not trying to take advantage---thanks very much for any info.

Ride safe and long
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.030" commetic/.035" quench
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06' modded heads
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perf valve job (Boyd's)
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SE heavy clutch diaphram spring
Hi comp A Balls starter
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Old 02-14-2005, 01:28 AM   #2 (permalink)
IronButt
 
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Quote:
Originally Posted by namooz
Got a few questions if ya can help.

1. Can someone tell me, what is the widest tire that can go on a '01 Dyna front wheel-19' 13 spoke ? I've got the mid glide conversion, so fat should fit. I'll remove the fender if need be.

2. If I go with a 16" front wheel, what will the drop on the front end be, basically 1 1/2 " depending on tire height?

3 .How does a fat tire, like a 150 on the front effect handling, ride?

...
1. The widest tire that can safely go on your wheel will be determined by the wheel width. Go to any of the major tire manufacturer's web sites and check their fitment information. Putting a tire designed for a wide rim on a narrow rim will not be safe. If you want to have a particular (wide) tire, then purchase a proper sized rim. The mfgr's fitment guides will have the wheel width information you need.

2. The diameter of a wheel/tire combination is determined by the diameter of the wheel and the height of the tire. Tire height can be calculated from the width and aspect ratio of the tire you are interested in.

For example a tire listed as 150/70 would have a width of 150mm and an aspect ratio of 70%. The aspect ratio is the height of the tire divided by the width of the tire. Thus for this example the height of the tire would be 105mm (70% of 150mm). Adding double the tire height to the wheel diameter would give you the total diameter of the combination.

Depending on the tires you fit, you could INCREASE the overall diameter of the wheel/tire combo and raise the bike when you go to smaller rims (or vice-versa).

3. Too many variables to answer this question. The front and rear tires should be designed to work with one another. You might take a look at the relative (front/back) sizes of tires on sport bikes or sport touring bikes that run wider tires.

I don't think the rear tires on HD's can't go much wider without modifying the rear fork. I would think your wider front tire will require a wider rear tire to ride properly. The tires should be matched to proper sized (width) front and back wheels. The rear fork/fender will need to be modified to accommodate the wider tire. The primary and rear drive will have to be modified to accommodate the wider rear fork. Kinda snowballs.

Good luck on your project.
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Old 02-14-2005, 11:03 AM   #3 (permalink)
Cabo Wabo '06
 
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Tire size?

Thanks 84 FXRP. That was a very informative response. It will help me to speed up the process. Thanks for taking the time to do that.

Ride safe and long.
__________________
05' Deluxe EFI/BC Pearl
Build, blueprint, & fine tune
95" KB domed pistons (10.3 to 10.6 dyn.comp.)
.030" commetic/.035" quench
HD cyl's .001" piston fit
06' modded heads
B Diamond high lift springs
perf valve job (Boyd's)
TW55 chain drive cams
S&S adj. pushrods
SE heavy clutch diaphram spring
Hi comp A Balls starter
Rivera 10/84 Ring gear
polished TB/manifold
Doherty w/Power Vents
Pro Pipe HS header w/Cycle Shack Rocket tip muff.
PCIII & Dyno
Jagg oil cooler
93HP/98TQ

Last edited by namooz : 02-14-2005 at 11:10 AM.
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