Page 1 of 2 12 LastLast
Results 1 to 10 of 20

Thread: Dual-sport tire sizes for SR400 (esp. front?)

  1. #1
    Junior Member
    Join Date
    Jul 2017
    Location
    Salt Lake City, Utah
    Posts
    21

    Dual-sport tire sizes for SR400 (esp. front?)

    Hi all!
    Can't believe I can't find this, but I've been looking for two hours, maybe just inept.

    SR400 comes stock with a front 90/100-18 and a rear 110/90-18. I'm having no trouble finding 18" rear tires with some tread (Heidenau Scouts, Continental TKC 80's), especially in the comparable 120/90 -18 size.

    I'm having much more trouble locating a suitable front. Especially because conversion charts seem to ignore the oddball 90/100 size.

    So:
    What are some offroad tire sizes that work well for an 18" front?
    And does anyone have experience fitting a 120/90 - 18 with tread into a stock swingarm?
    Finally an equivalent inch sizing for the rear is 18 x 4.0, correct? 3.0 for the front? 2.75?

    Thanks!
    Last edited by derblauereiter; 08-11-2017 at 02:34 AM.

  2. #2
    Junior Member
    Join Date
    Jul 2017
    Location
    Salt Lake City, Utah
    Posts
    21
    To answer my own question (in case anyone's interested), I feel good about
    Shinko 244: 3.00 - 18 in front, 4.10 - 18 in rear.
    Continental TKC 80: 3.50 - 18 in front, 4.00 - 18 in rear.

  3. #3
    Senior Member MadMax's Avatar
    Join Date
    Dec 2015
    Location
    Whitehaven Cumberland
    Posts
    585
    a 90/100 tyre is going to be a tall-ish 3.25 section whereas a 100/90 is nearer 3.50. A 3.00-18 will look a bit skinny.

  4. #4
    Not sure about dual-sport type tyres but a 120/90 road tyre fits fine.

    SR
    ...'Any unnecessary items on the bike, that it doesn't really need, shouldn't be there!'. (Café racers creed). SR..

  5. #5
    I run 100/90 front and 120/90 rear street tires without any issues at all.

    When I was looking at dual sport rubber the only two I found that I knew would fit were the Shinko 244 and Kenda 270.

    -Jake

  6. #6
    Junior Member
    Join Date
    Jul 2017
    Location
    Salt Lake City, Utah
    Posts
    21
    Click image for larger version. 

Name:	IMG_2281.jpg 
Views:	39 
Size:	98.7 KB 
ID:	3954

    Update: Initial ride report after putting Shinko 244's on. 3.50 x 18 in the front, 4.10 x 18 in the back. I ran 26psi in the front, 30 psi in the back for this ride.

    Tires were relatively easy to mount. I used stock tubes.

    Have only put 20 miles on them, on and off-road, so conditions may change as the tire protecting oil wears off. They look neat. Definitely chunkier than I expected.

    Off road riding is like night and day, the SR is way more confidence inspiring off road with some decent rubber. Definitely a trundley trail-worthy bike a-la the TW200, not something you'd want to go fast on, but can easily navigate ruts and feels somewhat nimble for a road bike with an 18" front wheel. Transitioning between dirt and road is much more fun and confidence inspiring than with the Battlax's.

    On the road, definitely less confidence inspiring going into curves. I haven't done a decent canyon ride yet, but may hold off, I have concerns that a 4.10 tire is too small and makes the rear of the bike feel 'tippy.' Transitioning into a turn feels like a definite 'shelf' right off the bat, and the back end kicks out ever so slightly, leading to a lack of confidence. I know you're probably saying 'what did you expect you put dirt tires on a SR400?!?" But I'm familiar with dirtbike handling and this feels less to do with the tread type and more to do with the 4.10 being a skinny-profile tire for the SR's rear rim. I may order a 4.60 and see if it's an improvement. Or perhaps I'll put a 120/80 Shinko 804 on it just to get really weird.

    Would love comments. Especially from experience.
    Click image for larger version. 

Name:	IMG_2279.jpg 
Views:	38 
Size:	98.5 KB 
ID:	3955
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	IMG_2281.jpg 
Views:	24 
Size:	98.9 KB 
ID:	3952   Click image for larger version. 

Name:	IMG_2279.jpg 
Views:	24 
Size:	98.6 KB 
ID:	3953  
    Last edited by derblauereiter; 08-17-2017 at 04:39 PM. Reason: photos were upside down.

  7. #7
    Senior Member
    Join Date
    Dec 2015
    Location
    murphy cove,nova scotia
    Posts
    306
    Tire sizing can be confusing
    a 4.10 is equivalent to a 3.50
    a 4.60 is equivalent to a 4.00

  8. #8
    This may help on sizing tyres, a 4.10 is the low profile equivilent of a 3.50
    Click image for larger version. 

Name:	TireChart%20(1).jpg 
Views:	22 
Size:	51.2 KB 
ID:	3956

  9. #9
    Junior Member
    Join Date
    Jul 2017
    Location
    Salt Lake City, Utah
    Posts
    21
    Quote Originally Posted by bmonk View Post
    Tire sizing can be confusing
    a 4.10 is equivalent to a 3.50
    a 4.60 is equivalent to a 4.00
    Yer damn right it is confusing!
    so you're saying, a 4.10 off-road tire is equivalent to a 3.5 on-road tire?

    Quote Originally Posted by Radiograf View Post
    This may help on sizing tyres, a 4.10 is the low profile equivilent of a 3.50
    Click image for larger version. 

Name:	TireChart%20(1).jpg 
Views:	22 
Size:	51.2 KB 
ID:	3956
    So according to this a 18 x 4.60 in the back should do quite nice for a beefy tire? Thanks!

  10. #10
    Junior Member
    Join Date
    Jul 2017
    Location
    Salt Lake City, Utah
    Posts
    21
    now I'm considering a Shinko 244 3.50 x 18 in the front and a Heidenau K60 Scout 120/90 x 18 in the rear, that should be a bit beefier than what I posted above and kosher in terms of the sizing, correct?

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •