Viewing 17 posts - 1 through 17 (of 17 total)
  • How slack is too slack?
  • phil5556
    Full Member

    Whyte T130S 130mm fork is about to get upped to 140mm which will obviously slacken the bike a little bit.

    I’ve also got an angleset -2deg headset on the shelf that I thought I might try, but wondering if it will end up too slack?

    It’s starting at 67deg HA but I think it would end up at about 64.5deg. Too slack and a ruined ride?

    What does STW think? Maybe 65.5 would be the sweet spot?

    chakaping
    Free Member

    It’s starting at 67deg HA but I think it would end up at about 64.5deg. Too slack and a ruined ride?

    What does STW think? Maybe 65.5 would be the sweet spot?

    Nah, go straight to the -2deg headset.

    You might even decide to supplement it with an offset bushing later to go a touch slacker still.

    chiefgrooveguru
    Full Member

    A -2 deg headset slackens the headtube vs the frame by 2 deg but rotates the whole bike forwards, steepening everything by about 0.5 deg. The 10mm longer fork will slacken it by a bit under half a degree, less still at sag. You’ll end up slightly above 65 deg head angle (but it could be about half a degree more or less depending on the manufacturing tolerances). I doubt you’ll find it too slack.

    appltn
    Full Member

    Adding fork travel and slacking the head tube together will keep most of your geometry about the same as it was before, just with a slacker head angle. The longer fork raises the front end, then the slacker head angle drops it again.

    Just do it, I don’t think you’ll regret it at all and if you do then you can always put the original headset back in.

    ta11pau1
    Full Member

    64.5 is about average these days tbh, my 3 year old bike with 65.5 (thanks to an extra 10mm on the fork) feels dated!

    intheborders
    Free Member

    I reckon my Flaremax is slacker (65 deg before a -2 headset added).

    It’ll also steepen your seat tube so that’s a positive too.

    tomhoward
    Full Member

    https://www.pinkbike.com/news/shand-launches-ioma-hardtail-with-58-degree-head-angle.html

    *60 degree, but supplies a +/- 2 degree angle adjust headset with it.

    hardtailonly
    Full Member

    I’ve just gone slacker on my Swarf Contour. Originally 66.5 HA. 2deg slackset and running a 150mm fork (geometry figures are for a 130mm), so that all brings it down to around 64-64.5°.

    Runs very nicely like that, a subtle but noticeable improvement.

    Speeder
    Full Member

    Mt Starling’s below 64 degrees and is great. You’ll be fine.

    joebristol
    Full Member

    Trail bike with around 64-65 degrees works fine for me. Had a Bird Aether 7 which is similar ish (but slacker) to the T130. Rear 4 bar suspension with 130mm travel and I was running a 150mm fork on it. The steering didn’t flip flop or anything like that – it was just confidence inspiring on the steep stuff and fine everywhere else.

    Now on a sentinel with 160 front / 150 rear travel that has a 63.6 degree head angle. It still feels natural / great to ride.

    I think the majority of us having been riding round on bikes that are steeper / shorter than ideal for years.

    Ben_Haworth
    Full Member

    You’ll be totes fine. Just on the road to getting to the righteous 63° 🙂

    phil5556
    Full Member

    Cool, well you’ve convinced me – I’ll be giving it a shot 🙂

    That Shand does seem toooooo slack surely? 😳

    tall_martin
    Full Member

    My mountain bikes
    Geometron g13- 64.2 +20mm fork +1 offset bushings so about 64?

    Hello Dave -62 degrees +10mm fork travel so about 61?

    Orange clockwork.67 degrees. -2 angle set, stock 27’7 fork length 506mm. Run with 26″ 150mm fork at 520mm (I think) axel to crown. so about 64 degrees?

    They are all fun. They all go up and down just fine 🙂

    zerocool
    Full Member

    I’ve never ridden a bike that wasn’t inporoved by slackening the head angle with either a slackest or offset bushings (or both). Go for it. If you don’t like it after a few months just take it out and sell it.

    At first I thought that if it was me I’d run a shorter fork on that Shand but having seen the BB drop is already 70mm that might make it a bit low, mine is 65mm and low enough (although I’ve never had a pedal strike with my 175mm cranks I’d still swap to 165mm for preference). I think too low a BB and you struggle to pop the front over things and manual.

    I donmt think it’s the slack head angle that makes modern hardtails look ‘odd’/wrong, it’s the really steep seat tubes (although I understand why we have them regarding reach/pedalling, etc) that make them look ‘odd’.

    ayjaydoubleyou
    Full Member

    I donmt think it’s the slack head angle that makes modern hardtails look ‘odd’/wrong, it’s the really steep seat tubes (although I understand why we have them regarding reach/pedalling, etc) that make them look ‘odd’.

    slack head angles combined with low top tubes – that are lower than the seat stays – kind of give the impression of taken a hard landing to flat and buckled.

    the inverse is the older bikes where the headtube was steeper than the seat tube. looks like theve been run into a wall.

    chestercopperpot
    Free Member

    Do it.

    It’s more a case of (or it was for me!) where you notice a difference. Bikes down to about 67 degrees felt quite similar to steeper angled bikes. When you get below 66-65.5 they feel better/safer on very steep trails and when counter steering drifts. It’s a subtle, not drastic difference, unless you have gone from one extreme to the other and back to back tested it on specific terrain which highlights the difference!

Viewing 17 posts - 1 through 17 (of 17 total)

You must be logged in to reply to this topic.

Thanks for popping by - why not stay a while?IT'S FREE

Sign up as a Singletrack Member and you can leave comments on stories, use the classified ads, and post in our forums, do quizzes and more.

Join us, join in, it’s free, and fun.