On One Chunky Monkey 26 x 2.4 max tyre pressure?

LittleSkink
LittleSkink Posts: 31
edited April 2017 in MTB buying advice
Looking for some fatish tyres for a sensible price and came across 2.4" Chunky Monkeys but cant find any tech info about them, they are 60TPI carcase but specifically wanted to know max pressure. I know Maxxis actually make them and their near equivalent (Ardent) varies from 60 to 120PSI depending on model

The plan is to run them c 80PSI on a tandem with my daughter on the back, we are talking over 100kg all up - so would you trust your 20St mate riding these?

Comments

  • The Rookie
    The Rookie Posts: 27,812
    20stone is 126 Kg.......so what weight is it?

    I weigh about 90Kg ready to ride and my 2.25 tyres at 28psi cope just fine, I think 80psi is a long way over where you should be!
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • The Rookie wrote:
    20stone is 126 Kg.......so what weight is it?

    I weigh about 90Kg ready to ride and my 2.25 tyres at 28psi cope just fine, I think 80psi is a long way over where you should be!

    didnt do the maths but reality is nearer 126kgs I reckon, thanks for that :)

    Just mentioned the solo comparison as often you mention "tandem" and folks think you have to use super strong Schwalbe Marathon tyres - but we have a comparatively light 20kg Tandem 70kg pilot and 30kg sprog, you have 90kg self and 10kg bike so we are only 20% up

    Maxxis quote 60 or 65PSI on their website for various Ardents (which I am guessing is similar/same carcass) the 120PSI came of Chain Reaction website and is clearly way off . . .

    Figure running at Max would probably be fine on something that fat, again I am extrapolating from tandemworld where folks run silly high pressures but not usually such fat tyres - and its all about volume really I guess
  • The Rookie
    The Rookie Posts: 27,812
    Unless you are rolling in a straight line and don't want grip, I'd be using around 40psi as a starter and looking to drop towards about 35 to be honest.

    Will you be tubeless or tubed?
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • LittleSkink
    LittleSkink Posts: 31
    edited March 2017
    for a Tandem I dont think Tubeless is a direction I plan to go, tubed are quick and easy to fix on the trail

    fwiw I email On One for tech info but didnt get a reply, so ordered a pair anyhow - will update when I collect them at the weekend

    Correction - On One have emailed to say it is 60PSI max
  • rockmonkeysc
    rockmonkeysc Posts: 14,774
    Chunky Monkey's are the worst tyres I've ever used. They seem to be made of plastic so there's not an awful lot of grip. They really drag, I found them slower rolling than a downhill carcass Maxxis Minion.
  • Chunky Monkey's are the worst tyres I've ever used. They seem to be made of plastic so there's not an awful lot of grip. They really drag, I found them slower rolling than a downhill carcass Maxxis Minion.

    sorry to hear that, the folks on MBR seem to rate them
    http://www.mbr.co.uk/reviews/tyres/on-one-chunky-monkey-trail-extreme-review
    and MBR riders
    http://www.mtbr.com/cat/tires-and-wheels/tire/on-one/chunky-monkey/prd_510679_151crx.aspx

    My priorities are (i) fat (ii) strong carcass (iii) cheap. On an off road tandem drag isn't such an issue, we won't do a tonne of miles on them and wont be pushing the grip
  • The Rookie
    The Rookie Posts: 27,812
    Why not go tubeless, if you puncture (much less likely in the first place) on a trail you just bang a tube in!
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • got these on the Tandem yesterday and put a few miles of road / off road on them - my they are fat fellas :)

    To answer my own original question these are good for 60PSI - and as others said, that was way too much in a 2.4" tyre, even on a Tandem running c120kg all up. Settled on 50PSI for now to see how we get on, may yet drop again to 45 if the side walls are happy

    Fitting was really easy with Panaracer 2.2/2.5 tubes. Went on dry with no need for soap and no fighting. Easily tweaked to run cleanly, unlike many tyres I have fitted - impressed with the quality

    On the road they drone like an old Landrover (which I kinda like) and have no problems in wet mud or on dry cinder - very happy with them.

    One almost issue was width - there is only 3 or 4mm clearance on each side of the frame on the rear. Definitely about the fattest tyre this bike can carry