Rear tires on the front??.

Discussion in 'Land of the Rising Sun: ADV Bikes from Japan' started by NortwestRider, Sep 27, 2012.

  1. NortwestRider

    NortwestRider TRIPOD ADVENTURER !!

    Joined:
    May 25, 2008
    Oddometer:
    4,220
    Location:
    3.7 miles North of Hell...SEATTLE....
    I'm not sure where to post this but I need a 120/90-17 front adventure/dual sport tire and all I can find ( except for 705's and TKC's) are rear tires.I have heard that if you mount them backwards they work ok for the front??.Anybody done this ??
    #1
  2. 2 SPOT

    2 SPOT wannabe

    Joined:
    Dec 14, 2005
    Oddometer:
    3,409
    Location:
    valley of the sunstroke, AZ
    i know of some ppl who run that way,,,, non directional tire is the better option.
    #2
  3. browneye

    browneye PIN IT & BANG GEARS

    Joined:
    Dec 17, 2009
    Oddometer:
    6,484
    Location:
    Orange County, CA
    Do-able, but why? For what bike?

    If it's a road bike with a 17 that's had a 120/70 road tire on it, the 120/90 has very much taller sidewall and flatter tread. They are not radial design and are tube type, and you lose about 60% of your contact patch.

    Personally I think it's a bad idea for a road bike. After you hit the guard rail or go off an embankment you'll wished you would have stuck with the right tire.

    I just posted on the 705 thread on the fullbores. :wink:


    EDIT: Oh, and rim width - the 120/90 tire is for a narrower rim than a roadbike with a 120/70. Lose even more of edge tread. Look for riding past the chicken-strips.
    #3
  4. NortwestRider

    NortwestRider TRIPOD ADVENTURER !!

    Joined:
    May 25, 2008
    Oddometer:
    4,220
    Location:
    3.7 miles North of Hell...SEATTLE....
    It's a GS500 thats going to Alaska and will see alot of dirt roads.A 120 will fit,I have seen one but it was more of a offroad tire than I want.I might go with the FullBore,if it's like the 705 it's sold as a front ir rear.


    Sent from my iPhone using Tapatalk
    #4
  5. NortwestRider

    NortwestRider TRIPOD ADVENTURER !!

    Joined:
    May 25, 2008
    Oddometer:
    4,220
    Location:
    3.7 miles North of Hell...SEATTLE....
    The stock tire is a 110,there just isn't any 80/20 tires in that size.


    Sent from my iPhone using Tapatalk
    #5
  6. browneye

    browneye PIN IT & BANG GEARS

    Joined:
    Dec 17, 2009
    Oddometer:
    6,484
    Location:
    Orange County, CA
    The fullbore looks identical, has slightly larger spaces between the treadblocks. The 150/70 is V rated, the smaller tires and fronts are 'S'. Which is fine for the front of your bike.

    Most any tire will run on the front, but some tend to be a less rounded profile (rear tires) which can further exacerbate the reduced contact patch issue. Or you ride them completely to the edge.

    I think the fullbores would be great for dirt roads. I like them fine on the tiger. Knobbies are better though, maybe a Heidenau or Mefo would work as well - lots of sizes.

    EDIT: yeah, just looked up tire sizes for GS500. Odd, came with a 110/70-17. I would run the 120/90 fullbore on it. Bet it would work pretty good. You may have to raise the front fender. Highly likely it won't fit under a low fender. Just don't try to scrape the pegs on the twisties.
    #6
  7. itsatdm

    itsatdm Long timer

    Joined:
    Jun 19, 2004
    Oddometer:
    5,032
    Location:
    Nor Ca.
    I ran an 18" rear on the front of my TDM. As long as you pick one with a rounded profile, it will handle fine. I mounted it as I would on the rear.


    If you settle for All Terrain instead of knobbies, you can find one that fits.

    Pirelll MT 90 A/T and Kenda make ones. If you want a taller aspect ratio, look at tires with inch measurements. They are as tall as wide. A Shinko 4.60 is an example. Typically you will have to run a tube in those.
    http://www.motorcycle-superstore.co...rt-Bike-Motocross-Dual-Sport-Tires-Tires.aspx

    If you have a radial on the rear, you can run a bias tire on the front, but not the opposite.

    You probably know this, but metric tires such as 110/90/17 are 110 mm in width, the second number is a percentage of the first or 99mm in this case. Inch tires are all 100%. A 4.60 would be 116.8/116.8mm. I chose the inch tire. I had modded the rear shock mount to gain ground clearance. The taller front did the same for the front of the bike.
    #7
  8. ben2go

    ben2go Moto Flunky

    Joined:
    Jun 23, 2011
    Oddometer:
    4,013
    Location:
    Upstate SC USA

    I run 120/60/17 sport tire on my GS500 and a 120/70 or bigger will rub the fender in a dual sport or offroad tire.I solved this by using a Bandit 400/600 front fender.It's still close.I now run a Katana 750 front end which has the same clearance issues.

    Bandit 400/600 front fender on a Katana 750 front end running a 120/60.
    [​IMG]
    #8
  9. NortwestRider

    NortwestRider TRIPOD ADVENTURER !!

    Joined:
    May 25, 2008
    Oddometer:
    4,220
    Location:
    3.7 miles North of Hell...SEATTLE....
    I will run a matching rear tire to the front.I might also mount a high fender
    (supermoto style ) but I will keep the fork brace and just raise it up.It's
    My wifes bike and she is NOT a knee dragger !!.I looked into the MT90 and Kenda 761? And I think they are both tube type.


    Sent from my iPhone using Tapatalk
    #9
  10. mustang

    mustang Lurker Extraordinaire

    Joined:
    Oct 11, 2007
    Oddometer:
    648
    Location:
    Cow Hampshire , Frozen Wasteland
    it works just fine , a 120 17 shinko 705 mounted backwards on the front . and mounted tubeless to boot ...........the sky didn't fall , and life was good :lol3:lol3

    [​IMG]
    #10
  11. Dave.0

    Dave.0 Been here awhile

    Joined:
    May 17, 2011
    Oddometer:
    833
    Location:
    north texas for now, sedona when I can get away
    dunlop 616 come in 17 inch front and rear sizes, and although it is marketed as a sport tire, it does very well on hard pack dirt/gravel
    #11
  12. NortwestRider

    NortwestRider TRIPOD ADVENTURER !!

    Joined:
    May 25, 2008
    Oddometer:
    4,220
    Location:
    3.7 miles North of Hell...SEATTLE....
    I think I will go with the FullBore,I had 2 705's come apart on the front of my Vstrom.How many miles did you get out of the 705 on the front ??.


    Sent from my iPhone using Tapatalk
    #12
  13. NortwestRider

    NortwestRider TRIPOD ADVENTURER !!

    Joined:
    May 25, 2008
    Oddometer:
    4,220
    Location:
    3.7 miles North of Hell...SEATTLE....
    I just looked at the full bore website and they don't list a 120 so I guess I will take my chances with another 705 !!.


    Sent from my iPhone using Tapatalk
    #13
  14. AustinJake

    AustinJake TE450-KLE-FXDWG

    Joined:
    Aug 20, 2010
    Oddometer:
    3,901
    Location:
    Austin, TX
    Me too, Kenda K761, has a good profile, sticks better on the street than a Pirelli MT60, my Kenda is not mounted backwards, mounted it per the rotation arrow

    [​IMG]
    #14
  15. NortwestRider

    NortwestRider TRIPOD ADVENTURER !!

    Joined:
    May 25, 2008
    Oddometer:
    4,220
    Location:
    3.7 miles North of Hell...SEATTLE....
    Is the Kenda a tube type ??.


    Sent from my iPhone using Tapatalk
    #15
  16. AustinJake

    AustinJake TE450-KLE-FXDWG

    Joined:
    Aug 20, 2010
    Oddometer:
    3,901
    Location:
    Austin, TX
    Yes it is a tube type tire, being run with no tube.

    [​IMG]
    #16
  17. NortwestRider

    NortwestRider TRIPOD ADVENTURER !!

    Joined:
    May 25, 2008
    Oddometer:
    4,220
    Location:
    3.7 miles North of Hell...SEATTLE....
    I thought tube type tires had a different bead and could/should not be run without a tube !!.


    Sent from my iPhone using Tapatalk
    #17
  18. Murf2

    Murf2 Been here awhile

    Joined:
    Feb 11, 2007
    Oddometer:
    853
    Location:
    Kansas
    AustinJake, How does that tire work off road? Do you like it & have you tried any other dual sport sytle tires?

    Thanks. Murf2
    #18
  19. browneye

    browneye PIN IT & BANG GEARS

    Joined:
    Dec 17, 2009
    Oddometer:
    6,484
    Location:
    Orange County, CA
    The bead of a tubless rim is different, it has a lock ring around the bead.

    The inner liner of a tubeless tire is designed to be airtight more so than a tube type tire. However they are so good these days that most report tube type tires holding air pretty good. I wouldn't do it but it's not that uncommon.

    Running a tube in a tubeless tire is quite common, done all the time. You want to keep pressures up to keep heat down. Tubes in either tubed or tubeless tires will run hotter than a tubeless.

    It also said a tube will blow out suddenly when punctured, like a balloon, deflate very quickly, whereas a tubeless will leak down slowly forwarning you of impending flatness. Gives you time to get off the road. Tubeless tires are said to be much safer for hiway travel, and most are radials now. Better grip, safer for flats, bigger contact area, higher mileage both for fuel as well as life, better ride, cooler running. Also much easier to patch as you can generally just plug them on the wheel and reinflate. A tube has to be removed, patched, and/or replaced.

    Sheesh...tires 101. I'm done. :lol3

    :freaky

    All of those big dualsport tires run like shit on a roadbike. AustinJake bought a Husky TE. LOL
    #19
  20. burmbuster

    burmbuster Long timer

    Joined:
    Oct 16, 2007
    Oddometer:
    1,432
    Location:
    South East USA
    Pretty informative thread. I have a friend that runs a car tire on the rear for his cruiser. What next?
    #20