Bontrager Jones ACX 29er UST 29er Tire

3.57/5 (7 Reviews)


Product Description

  • HOT 29er tire for wide range of conditions
  • Gives big volume and super float
  • Reinforced knobs reduce squirm in hard-packed corners
  • Taller and larger knobs
  • 403095 is Tubeless Ready

    Twenty Nine inch wheels are a larger alternative to the traditional 26" mountain bike wheel. They roll over obstacles and maintain traction better then smaller wheels.



  • Review Options:  Sorted by Latest Review | Sort by Best Rating

    Reviews 1 - 7 (7 Reviews Total)

    User Reviews

    Overall Rating:5
    Value Rating:5
    Submitted by Miker J a Cross Country Rider from PA

    Date Reviewed: April 30, 2009

    Strengths:    Good all around tire. Good tread pattern. Great as a front tire.

    Weaknesses:    None if used properly.

    Bottom Line:   
    Great tire up front. I've used it carefully out back but at 190# I've had to baby it a bit. Folks complain that it's sidewalls are thin - well, its a full knobbie with a relatively low weight. You can't get something for nothing. For an all-round set up I've found the DryX (XdX) out back and the ACX up front to be super.

    Bonti's TLR rim-tire set up is foolproof on installation and bombproof in function. Their Mustang TLR rim is great. Latterally stiff and holds true very well.

    Like a King rear hub, it's a component (Bonti rim-tire setup) I no longer have to think about.

    Expand full review >>

    Favorite Trail:   Dirt ones

    Duration Product Used:   1 Year

    Similar Products Used:   TNTC

    Bike Setup:   TNTC

    Overall Rating:4
    Value Rating:4
    Submitted by jamesmichael a Cross Country Rider from newbury park

    Date Reviewed: April 16, 2009

    Strengths:    grip,grip,and more grip. I tried Racing Ralph's thought they were great in turns. These run with sealent at 20 psi are even better. I let let it fly. Way too much fun.

    Weaknesses:    Just put them on, I thought they were way too soft to hold up, but we will see. Make sure the psi is low enough, to much, like all others too bouncy

    Bottom Line:   
    Great tire on the dirt at low psi. If you don't stop to put more air in tires for the ride home on the road it feels like you are riding in a sand pit 6 inches deep. I question the durability of the tires, but that remains to be seen. If they hold up well, I will keep them around. Ardents are the next one to try. But so far these grip way too well to take off for now.

    Expand full review >>

    Favorite Trail:   any dry one

    Duration Product Used:   Less than 1 month

    Purchased At:   michael's

    Similar Products Used:   Racing Ralph's

    Bike Setup:   Sub 25lbs steel hardtail 29er, and loving every ride

    Overall Rating:1
    Value Rating:2
    Submitted by Crockpot2001 a Cross Country Rider from Songdo, Incheon, Korea

    Date Reviewed: August 31, 2008

    Strengths:    Great tread, good for loose dirt

    Weaknesses:    Slashed sidewalls

    Bottom Line:   
    5 km to go in a mostly fireroad MTB race (yup, that's called MTB racing in Korea). White spooge started flinging everywhere at 60 KPH. Sidewall sliced like cheese. Never will buy this tire again.

    Expand full review >>

    Favorite Trail:   Devil's gulch in Wanatchee, WA

    Duration Product Used:   Less than 1 month

    Price Paid:    $35.00

    Purchased At:   Trek Store

    Similar Products Used:   Rampage, Motoraptor, seagaro


    Overall Rating:4
    Value Rating:3
    Submitted by mudslinger21 a Weekend Warrior from MoVal, CA, US

    Date Reviewed: August 26, 2008

    Strengths:    Light, smooth, Fast rolling

    Weaknesses:    thin casing, price $44 each

    Bottom Line:   
    Great grip as a rear tire, front tire little loose during cornering. Would not use over sharp rocks they will slice or puncture. But for dirt trails the are great. They also work great with stans tubeless setup.

    Expand full review >>

    Duration Product Used:   3 months

    Bike Setup:   Stock 2008 Paragon

    Overall Rating:1
    Value Rating:2
    Submitted by Mike a Weekend Warrior from Frederick, MD, Frederick

    Date Reviewed: May 22, 2008

    Strengths:    Great tread pattern. Has great tracktion in wet and muddy conditions.

    Weaknesses:    Side walls. I tore two rear sidewalls. These are not good for rocky conditions

    Bottom Line:   
    Depends on the conditions you ride in

    Expand full review >>

    Favorite Trail:   Every Trail in the Shed

    Duration Product Used:   3 months

    Similar Products Used:   Hutchinson Python UST

    Bike Setup:   08 GF Paragon w/ Mavic C29SSMAX

    Overall Rating:5
    Value Rating:5
    Submitted by Paul a Racer from Upland, CA

    Date Reviewed: April 28, 2008

    Strengths:    sticks well in the loose dry stuff and hardpack. Good cornering and grabs on hard uphill acceleration. Treadwear is great. Only raced on it one time, first place.

    Weaknesses:    thin sidewalls. easily sliced up.

    Bottom Line:   
    All around great tire, reliable and predictable.

    Expand full review >>

    Favorite Trail:   Thunder Mountain, UT

    Duration Product Used:   6 months

    Price Paid:    $40.00

    Purchased At:   Coates

    Similar Products Used:   As far as 29'er go only Kenda's that were not UST.

    Bike Setup:   Kona Kula 2-9, Juicy Ultimates, full XTR, Reba up front, Bonty race x lite, Titec Hellbent

    Overall Rating:5
    Value Rating:5
    Submitted by matt a Cross Country Rider from sticks o' philly...pa

    Date Reviewed: February 28, 2008

    Strengths:    Light, Way grippy, tubeless, rolls smoofly

    Weaknesses:    maybe sidewall



    Bottom Line:   
    great tire, grabs the corners coming down and digs in on the way up...try it if you wanna stay moving with no worries

    Expand full review >>

    Favorite Trail:   french creek

    Duration Product Used:   3 months

    Purchased At:   Bike Line of Ptown

    Similar Products Used:   kendas, wtbs, and other bonty rubber

    Bike Setup:   29 ferrous, fox, juicy 7, bonty post,stem, and whls...1x1

    Reviews 1 - 7 (7 Reviews Total)

    Review Options:  Sorted by Latest Review | Sort by Best Rating

     

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