Larger vs. small front tire - Motorcycle Forum
Motorcycle Forum

Go Back   Motorcycle Forum > Motorcycle Forums > First Bike / New Rider

First Bike / New Rider This is the place where new riders can get help from community experts



Reply
 
Thread Tools
Old 05-05-2010, 03:16 PM   #1
bdrake
Registered

Join Date: May 2010
Posts: 1
bdrake is on a distinguished road
Default Larger vs. small front tire

Let me start by saying it is nice to find a site like this. Like anything there is a lot of information to comb through but it is good reading.

So I got my endoresement a few weeks ago and have started the process of looking for bikes. I am a little over 6' so I am going through the same issues of first bike questions like most. I did manage to ride a couple cruiser bikes and noticed a huge difference right off regarding balance but that is a separate topic. One variation I see are front tire sizes. I am curious if there is advantage of one over the other. Any input would be appreciated.
bdrake is offline   Reply With Quote

Advertisement [Remove Advertisement]
Old 05-05-2010, 06:22 PM   #2
markk53
Rough Writer
 
markk53's Avatar

Join Date: Dec 2009
Location: Delaware, Ohio
Posts: 3,842
markk53 has a spectacular aura about
Default

Fatter or larger diameter (higher profile or rim) tires slows handling, this usually leads to a more stable straight line feel and requires more effort to steer.

Narrower or smaller diameter (lower profile or rim) tires quicken handling, making it much easier to change directions quickly, making the bike less stable in a straight line. If the change is radical enough it will make the bike feel twitchy, any movement of the bars or weight shift will cause the bike to move a bit. Some may say the bike has a "nervous" feel.

Wider tires on proper rim widths will possibly brake better, but really that's only if you are braking with the front brake to the point of sliding the front tire. I can brake hard enough with my KLX650 to start to make the 90/90 front tire start to squeal a bit. The Zephyr is borderline, I've braked hard enough I think to start some tread squirm (barely sliding), but I'm not sure and it is braking so hard at that point I'm not sure I could gain much with a wider tire. I'll see how it goes with a set of braided lines next. If I want wider I have to go to a different rim to fit it. The stock rim is too narrow to jump the next size.

Handling as I am speaking of it is the capability to turn in to corners and switch directions (chicane type) quickly. Pretty much that simple.

I've learned this from experience moving both ways in width/diameter on various motorcycles I've owned.

I had a MotoGuzzi and I went for the beefy big tire look - handled like a dump truck. I quickened the handling of a standard GoldWing by dropping one size in width both front and rear - picked it up enormously on winding roads, but not too bad on stability. Finally I was used to the quick handling of my dual sport with the narrow front tire and fairly light weight, that when I got the Zephyr it felt like a truck when it came to cornering and directional change. I resolved it by putting on one profile range lower front tire, from an 80% aspect ratio to a 70% aspect ratio and raised the rear end about 2 inches. Made the bike handle much quicker, which I like. It also made it slightly twitchy at higher speeds, but it doesn't bother me. So there's the practical application of what I've said.
__________________
KLX650C, Zephyr 550
SR500, Bultaco Sherpa T
markk53 is offline   Reply With Quote
Reply
Thread Tools


All times are GMT -4. The time now is 03:53 AM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.