Question about Harley Davidson FXST Softail Standard Motorcycles

1 Answer

What are the largest tires (width) that I can put on my 03 FXST (both rear and front) without doing any modifications. Thanks!

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Harley Davidson Master
  • 19,396 Answers


Standard tires are already oversized in 03 model. This are the maximum standard allowed, probably the same as what you already have:
Front - D402F MH90-21 54H
Rear - D401 150/80B16 71H
(front: 80/90 - rear :150/80-it was 130 in 02 model)

Without modification you cannot use any bigger tire. By changing wheel, belt and pulley, you can mount at rear up to 200 at rear (see job done on the 06 softail here).

At front you need to replace wheel and to move the fender. The result is not always great when you do modification to front wheel. The best thing to do is buying a spacer kit.



Posted on Nov 12, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

2001 Vulcan 1500 Classic E. Can I put a wider back tire on and if I can how wide can I go?

talk this over with a bike shop that sells rims and tires
there are several things to consider
ride characteristics change dramatically with different tire widths
legal ramifications of different front and rear tires
real advantages of wider tires as against "looks cool"
costs of new rim and wider tire against standard tires
modification plates for the wider tire
Talk it over with an accredited bike shop and find a person that has real experience and not just a salesman

Mar 08, 2016 | kawasaki Motorcycles

1 Answer

What is the largest rear tire that can be put on a 2003 FXST Harley

Hi Anonymous, call your local dealer or reputable shop they install tires all day long and this question is probaly the most popular. Good luck

Dec 02, 2013 | 2000 Harley Davidson FLHR-FLHRI Road king

1 Answer

What is the largest rear tire I can put on a 2003 FXST Harley Davidson

Hi Anonymous, call your local dealers parts/service department for options. Have nice day.

Dec 02, 2013 | 2003 Harley Davidson FXST Softail Standard

1 Answer

What are the standard wheel sizes of a 2009 FXST

Harley did not make a FXST in 2009 so I am assuming you need the tire and rim sizes for the 2003. The tire sizes are front 80/90-19 or a MH90-21 depending on rim size and rear is 150/80B-16 71H. I hope this answered your question.

Oct 25, 2010 | 2003 Harley Davidson FXST Softail Standard

2 Answers

Tire Pressure - Harley Davidson Heritage Softtail

30 psi front
36 psi rear (single rider)
40 psi rear (dual riders)

Apr 02, 2010 | 2003 Harley Davidson FXST Softail Standard

1 Answer

Will a larger rear tire on my 2003 road king fit.any modifacations required.

About the largest you want to go without any modifications...and it can be a tight squeeze is a 140/ or a MU- . You can purchase for upto a couple of grand after market wide tire kits to run like a 180. I may be wrong but I do not think Harley offers a Wide Tire Installation Kit
for your bike any longer. hope this helps,


Dec 27, 2009 | 2003 Harley Davidson FLHR Road king

1 Answer

Replacing tires need procedure and torque on a 2004 softail

You will pretty much need a tire machine to remove the old tires and put on fresh ones. Torque depends on the model of your bike.

Most front axle nuts are torqued to 65 foot pounds. The same applies to the rear wheel on most models except touring (FLH series) which usually are torqued to 105 foot pounds.

Jun 29, 2009 | 2004 Harley Davidson FXST - FXSTI Softail...

1 Answer

Putting 19 inch 2007 porsche 911 turbo wheels on 2001 like car


Dec 16, 2008 | 2007 Porsche 911 Turbo Coupe

1 Answer

Tire question

10 over is about the largest you can run without modification

Nov 20, 2008 | 2002 Harley Davidson FLSTS Heritage...

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

375 people viewed this question

Ask a Question

Usually answered in minutes!

Top Harley Davidson Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4535 Answers


Level 3 Expert

4340 Answers


Level 3 Expert

76630 Answers

Are you a Harley Davidson Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides