Needing to replace my front tire before ROT next month... I have an 01 WideGlide... stock tire is MH90-21 (which i believe is 80-90-21). Can I fit a 90-90 tire without any modifications... or should i just stick with the 80-90?

 

see here:
http://www.hdwheels.com/product.htm

 

NICE! Thanks!

 

just put a 90/90-21 Night Dragon on mine a few weeks ago,,, its just a hair taller and wider than stock

 

For sure the 90/90-21 Night Dragon fits. Shouldn't have to adjust the fender any, but check it before you ride.

 

You should be able to. I have a 90/90/21 Avon Roadmaster on my wideglide, and that's supposed to be the largest available in that size.

 

A 90/90-21 will fit nicely on a 21 x 2.15 wheel; with the Night Dragon I did adjust the fender for a nice smooth fit. If you do go with a Pirelli Night Dragon be sure you don't run your pressure too low; 38psi is a good starting point

 

i guess i hadn't even considered inflation differences versus the downtube instructions. did you get the pressure specs from the Pirelli site?

Also, what size hex did you use on the fender bolts. i tried a 6 and bad things happened.

 

Don't feel bad, man; I did the same damn thing, tossed a 6mm at it but in true HD fashion mixing and matching SAE and metric those are actually 1/4" allen, the nut is 1/2". 6mm is .236, close but no cigar. I had to replace one of those fender bolts the first time I tried to break them loose 2 years ago... oops...

Just an FYI since this just popped in to my little brain. When you change out your rear brakes the pad pin on the caliper is metric; a 6.5mm 12 point but have a 1/4" 12 point on hand and you can outsmart the HD confusion I dunno why that just jumped in to my head...

As far as the tire pressures on the Pirelli I ran them exclusively on my track bikes and I believe due to their more rounded profile they've always liked just a touch more pressure. I experimented with different front and rear pressures on the Wide Glide and found the sweet spot on the front is 38 - 39 and the rear is 41 - 42. Too low of a pressure on the front your handling is trashed and you're going to have accelerated cupping/scalloping of the tire. Reindeer recently posted he had cupping on his Night Dragon at lower front tire pressures.

I checked this brand new set of Night Dragons before I rode today; front at 38psi, rear at 42psi. Took them to the school parking lot and did a good job of scrubbing them in; circles, figure 8's slowly increasing lean angle. They felt great on the ride this afternoon