Tire pressure--What do you run?

Discussion in 'Shop Talk' started by AKAKTM, Apr 21, 2016.



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  1. AKAKTM

    AKAKTM Well-Known Member

    Location:
    SCV
    Name:
    Tony A
    Current Bike:
    Ibis Ripley, Enduro
    I was reading the thread on how to go tubeless--lots of GREAT input there. Thanks to all. I want to ask a relatively simple question/survey. List the following.

    Tire Pressure / Tire Brand & Size / Approximate Internal Rim Width
    I'm 195 geared up.

    Here are mine for my main ride (all tubeless):
    15 front / Nobby Nic 3.0x27.5 / 38mm
    19 rear / Rocket Ron 2.8x27.5 / 38mm

    20 front / Hans Dampf 2.35x29 / 30mm
    23 rear / Nobby Nic 2.35x29 / 30mm

    Over the years, I've learned the benefits of lower tire pressure (on the proper rims) come with few trade offs. I'm still tweaking the pressure and learning about the 27.5+ and haven't fully settled. All this said, these are the pressures I run in our local terrain. When at Mammoth or when riding more aggressive/rocky/roots, I will add pressure as needed, though I rarely go above 26 on the 29 rims and don't think I'll ever get to 20 on the 27.5+ rims.

    What's your story?
     
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  2. knucklebuster

    knucklebuster Well-Known Member

    Location:
    34.2295° N, 117.2257° W
    Name:
    Dave
    Current Bike:
    Guerrilla Gravity Megatrail
    Good thread @AKAKTM . Is the rim width you listed internal? I think it would be also be helpful to list the rider weight geared up and what casing the tires have, and if they are "tubeless ready" tires/rims or not. Maybe also rigid/hardtail/fs. Wow that makes it more complicated...

    Mine:
    Around 185-190 geared (gotta lose some), FS bike 6"f/7"r
    Front DHF 26x2.3 Exo case, TR, 26mm wide inner width rim: 22-23 PSI
    Rear DHR2 26x2.3 Exo case, TR, 26mm wide rim: 24-25 PSI

    I occasionally get rim strikes in the rear on high speed rocky decents, so don't really go lower if I know I'm riding such a trail. I'll lower it a few psi, 20 min, for lower speed steep stuff.
    The front if I go much lower I start feeling tire squirm in high g corners. Knock on wood I have not burped a front, and don't ever want to. I don't do big jumps on purpose or I'd probably run more in the front. I do run into rocks and stuff allot tho.
     
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  3. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower
    Highball:
    20 front / Maxxis Ikon EXO 29 x 2.35 / Stans Arch EX
    24 rear / Maxxis Ikon EXO 29 x 2.2 / Stans Arch EX

    Tallboy(mine):
    18-20 front / Maxxis HR II EXO 29 x 2.3 / Velocity Blunt
    24 rear / Maxxis Ikon EXO 29 x 2.20 / Stans Arch EX

    Tallboy(wife):
    16-18 front / Maxxis Ardent 29 x. 2.4 EXO / Stans Arch non EX
    24 rear / Geax Saguaro 29 x 2.2 / Stans Arch EX

    E.M.D.(wife)
    22 front / Geax Goma 29 x 2.25 / Crank Bros. Cobalt 11
    26 rear / WTB Nano 29 x 2.1 / Crank Bros. Cobalt 11

    I only run Maxxis EXO tires any more. I like the stiffer more durable sidewalls that allow me to run lower pressures.

    I fought going tubeless for many many years. When I finally did, seems like all my tires were run in the 26 front/29 range. Over time I got more confident with the set ups and the pressures came down.

    We fun some lighter, non tubeless ready tires on my wife's bikes, so for her weight we run the pressures a bit higher.
     
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  4. riiz

    riiz Member

    Location:
    Redlands, CA
    Name:
    Eric
    Current Bike:
    Santa Cruz Heckler/Killmaleon
    SC Heckler: 650b
    21-22 psi / WTB Vigilante 2.3 FR/Light / WTB i29 rim
    26-27 psi / WTB Trail Boss 2.25 FR/Light / WTB i29 rim

    Surly Straggler - 650b
    34 psi / WTB Horizon 47c / WTB i23 rim
    41 psi / WTB Horizon 47c / WTB i23 rim

    Soma B-side - In full rigid mode for bike camping - 650b+
    13-14 psi / WTB Bridger 3.0 / WTB i35
    20-21 psi / WTB Breakout 2.8 / WTB i29

    I like Maxxis and WTB tires, especially the new stuff from WTB, so I've been using the Soma as a testbed. Also tried out a 2.5 Breakout on the Soma at one point, its a great tire too, but heavy with the Tough casing. Which btw is amazing, but adds another 150-200g per tire, so great for shuttling/gravity use, but not as fun when the bike is pointed up more so than down.

    Edited: 10/13/17
     
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  5. Daddy Dirtbag

    Daddy Dirtbag Member

    Location:
    Castaic
    Name:
    Jeff Johansen
    Current Bike:
    2016 Trek Stache 9 29+
    All of my skinny 29" tires get 28-30 psi. I can get down close to 25 psi before they start squirming. My 29er rims are 19 mm to 21 mm inner width.

    The 29 x 3 plus size tires get 18 psi rear and 16 psi - 17 psi in the front tire. Any less than that, and they start making some scary noises when landing jumps, and pushing hard in some corners. The rims on that bike are 44 mm internal width Mulefut rims.
     
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  6. herzalot

    herzalot iMTB Hooligan

    Location:
    Laguna Beach
    Name:
    Chris
    Current Bike:
    2020 SC Megaplower
    Rider - 215 lbs with hydration pack. I am not subtle when I ride. Fast rock gardens are my forte.
    Bike: Tracer 275c - set up tubeless. 160mm travel at both ends. I run my suspension soft.
    Rims - Stans Flow EX internal 25mm.
    Rear- 25-27 psi Maxxis Minion DHR II 2.30 Exo, TR
    Front - 23-25 psi Maxxis Minion DHF 2.30 Exo 3c, TR

    EDIT: I have recently decreased these. 22-24psi rear, 20-22 front. Runs great.
     
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  7. El Immigrante

    El Immigrante Member

    Location:
    SFV
    Name:
    Montalvo
    Current Bike:
    Ibis
    Great thread.

    I plan to start at 25-30 f/r on Nobby Nics on the 35mm 742s.
     
    Danmtchl likes this.
  8. mike

    mike iMTB Hooligan

    Location:
    Western US
    Name:
    Mike O
    Current Bike:
    HT, FS
    Different pressure based on the ride, surface, bike and how I feel. Could be anything from 15 to over 30, and can change mid-ride.
     
    kioti, Mikie, Luis and 4 others like this.
  9. Danmtchl

    Danmtchl Well-Known Member

    Location:
    Bakersfield
    Name:
    Dan
    Current Bike:
    2020 Trek Fuel EX 9.7
    Rider- 235 geared up with Camelbak filled up.

    Ride- 15 Devinci Troy, 150F/140R. I run my suspension at semi firm.

    Rims- Easton ARC 27mm internal/ 31mm outer
    Tires- Maxxis Agressor 2.3 TR Exo front and rear
    Pressure 33 rear 30 front, ran tubeless
     
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  10. Runs with Scissors

    Runs with Scissors iMTB Hooligan

    Location:
    West Anaheim
    Name:
    Mark Whitaker
    Current Bike:
    2015 Giant XTC Advanced 1 29er
    105 psi front; 100 psi rear, Continental Ultra Sports. (That's on the road bike);

    22 rear and 20-22 front. Rider 151 lbs, running tubeless 2.25" Maxxis Ardents front & rear.
     
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  11. Faust29

    Faust29 iMTB Hooligan

    Location:
    irgendwo
    Name:
    B. Bunny
    Current Bike:
    2 SC and a STDM
    I'm around 205... Santa Cruz hardtail with 100mm fork. I run either an Arch or Flow in the back, and usually the Crest up front. I thought I was running between 28-30 in the rear, and 25-27 in the front. It's what felt good... And that's what my old cheap gauge showed. I recently bought a new digital gauge that consistently showed about 3 pounds less than the old one. I have the tire pressure readings in the VW, so after a quick comparison, it seems the new gauge is the more accurate.

    I now know that I've actually been running 25-27 in the rear, and 22-24 in the front. The range is general. It depends on what I'm riding. If it's all fire road, I'll run it harder. If I know I'm going to ride chunkier stuff, I'll run it at the lower end.

    I usually run either an Ikon or X-King in the rear, and a Mountain King up front. Lately, though, I've been running the PricePoint cheapies... All tubeless.
     
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  12. DangerDirtyD

    DangerDirtyD iMTB Addict

    Location:
    CA
    Name:
    Chicken Nugget
    Current Bike:
    2018 Guerrilla Gravity SMASH
    6.3" dual suspension 26er, 245lbs storm trooper'd sans full face, Kenda Nevegal DTC 2.35 front @ 33-35 psi, Bontrager XR4 TR Team Issue 2.35 rear @ 40-45psi, both tubeless. Wheels are Bontrager Rhythm Elite 24mm internal width. I run my suspension moderately stiff, I mean moderately soft. Bike feels squrrley with lower air pressure.

    I will be replacing the Nevegal with a Maxxis DHF 3C EXO 2.5 pretty soon. It's not TR but it will be run tubeless.
     
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  13. herzalot

    herzalot iMTB Hooligan

    Location:
    Laguna Beach
    Name:
    Chris
    Current Bike:
    2020 SC Megaplower
    I hope that works...
     
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  14. DangerDirtyD

    DangerDirtyD iMTB Addict

    Location:
    CA
    Name:
    Chicken Nugget
    Current Bike:
    2018 Guerrilla Gravity SMASH
    I'll report back.
     
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  15. Mikie

    Mikie Admin/iMTB Hooligan

    Location:
    Lebec, California
    Name:
    Mikie Watson
    Current Bike:
    Ibis DV9, Santa Cruz Hightower
    Rider - 195lbs with gear...
    I ride Tubeless (I think it's crazy talk if anyone is not nowadays)

    Bike - Yeti ASR 5c
    Front - 140mm Fox Float 36
    Rear - 140mm Travel RP23 Fox Float

    Front WTB i25 rim (25mm i.d.) Maxxis Minion DHF 2.30 @ 20psi
    Rear WTB i25 rim Maxxis Minion DHR II 2.30 @ 25psi
     
    Danmtchl likes this.
  16. RS VR6

    RS VR6 Well-Known Member

    Location:
    Valencia/Simi
    Name:
    Lee
    Current Bike:
    Banshee Shartfire/Chiner 29r
    #145 (pre gear)

    29r HT (Workswell 062) tubeless
    Rocket Ron 29x2.25, ~18psi front and ~20psi rear, Roval Control Carbon i22mm

    27.5 FS (Banshee Spitfire) tubeless
    Hans Dampf 27.5x2.35/Nobby Nic 27.2.35, ~17psi front and ~19psi rear, Apex carbon rims i29mm

    Road (Cervelo S2) tubular
    Vittoria Corsa Elite 700x25, 90psi front and 95psi rear, Zipp 404 Firecrest
     
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  17. Cornholio

    Cornholio iMTB Rockstah

    Location:
    *
    Name:
    *
    ~205lbs with gear depending on how much water in my Camelhump

    Niner RIP9 125mm/140mm
    29mm id rims

    21 psi F - Maxxis Tomahawk 2.3 EXO

    25 psi R - Maxxis Minion SS 2.3 EXO
     
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  18. DangerDirtyD

    DangerDirtyD iMTB Addict

    Location:
    CA
    Name:
    Chicken Nugget
    Current Bike:
    2018 Guerrilla Gravity SMASH
    I mounted the Maxxis DHF 3C EXO 26" x 2.5" on my front wheel tubeless with the older Stans sealant despite the tire not being TR, and it held air no problem overnight. The ride today was good. The 2.5" tire actually measures 2.21" sidewall to sidewall and 2.29" knob to knob. That's crap because I like the wider footprint, but at least the weight is less (860g) and the tire tread is awesome! Corners great!
     
  19. jaime

    jaime Well-Known Member

    Location:
    Corona, ca
    Name:
    jaime
    Current Bike:
    '15 Giant reign advanced 1
    I changed the street tires to the knobs and set up the f/25 and r/38 (tubeless) and didn't like the way it felt on the corners, kind of loose...need to go back to f/20 r/35 :)
     
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  20. Cornholio

    Cornholio iMTB Rockstah

    Location:
    *
    Name:
    *
    15 psi more in the rear? Seems like a big difference between front and rear pressures.
     
    herzalot, jaime, UPSed and 1 other person like this.
  21. jaime

    jaime Well-Known Member

    Location:
    Corona, ca
    Name:
    jaime
    Current Bike:
    '15 Giant reign advanced 1
    @Cornholio I saw this formula before, but didn't trust it. By recomendations of our own fashion guru @herz. From 25 to 20 front and from 40 to 35 rear and was riding perfect, regular trails and snow summit and after getting my bike back from my lbs they pumped some air in an noticed I had 20/f and recommended me to pump 5 more and same aa the rear...but tried the other day here in skyline and didn't like the feeling that is why I'm back to 20/35 ;)

    This is the formula from Stans website.Screenshot_20161017-110725.png
     
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  22. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower
    That formula is fir Stans Tires on Stans rims. 35-40 psi sounds really really high. Think the Pro's who are going way faster and way harder aren't running that high.

    For me @190 lbs I run 20-22 lbs. in the front on my Ardent Race EXO 2.35 and 24-25 on the rear Ardent Race 2.25 mounted up to Arch EX's. Even at those pressures they feel rock hard on some days.

    If you are still running those Hans Dampf's....you shouldn't be over 25 psi at either end.
     
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  23. jaime

    jaime Well-Known Member

    Location:
    Corona, ca
    Name:
    jaime
    Current Bike:
    '15 Giant reign advanced 1
    @mtnbikej I'm running flow ex with magic/front hans/rear
     
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  24. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower

    Still sounds like too much PSI. Wider rim should allow for lower pressures.
     
    Mikie, jaime, Faust29 and 2 others like this.
  25. Redman

    Redman Well-Known Member

    Location:
    Henderson, Nv
    Name:
    Kevin
    Current Bike:
    SC OG Hightower 29'r
    23 in the front on alum rim w/ highroller II's
    24.5 in the back on alum rim w/ Minion DHR

    WTB i23 rims 27.5
     
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  26. herzalot

    herzalot iMTB Hooligan

    Location:
    Laguna Beach
    Name:
    Chris
    Current Bike:
    2020 SC Megaplower
    I don't think I recommended 35 psi rear (did I)? If I did I was probably drinking. :confused: I don't think I've ever recommended over 30 psi. Maybe I hit the wrong key when I responded. I would have recommended about 25-28 in the rear tire for you. I run about 20-22 front and 22-24 rear at 210 lbs without pack - Stans Flow EX rims, tubeless. Minion 2.30s 27.5.
     
    kioti, Mikie, Cornholio and 3 others like this.
  27. rossage

    rossage iMTB Hooligan

    Location:
    East Sacramento
    Name:
    Ross Lawson
    Current Bike:
    Highball
    21 front. Ardent 2.35 EXO on WTB i23
    20 rear. Minion SS 2.35 EXO on WTB i23

    I also use a Topeak digital gauge since neither of my pump gauges are very accurate. The gauge has a bleed function that I can use to bleed down the air from the tire to get the pressure I want. Riding a rigid hardtail has made me quite sensitive to tire pressure...wonder why?
     
  28. jaime

    jaime Well-Known Member

    Location:
    Corona, ca
    Name:
    jaime
    Current Bike:
    '15 Giant reign advanced 1
    Sorry @herzalot I didn't know what I was thinking when I mentioned your holy name..my bad. And I didn't pay attention at the screenshot mentioning stans tires with stans wheels good pointing that out @mtnbikej . Will check my pressure again.
    Man I love my Imtb family for always helping out us simple peasants (Me) on the mtb sport :thumbsup:
     
    kioti, Mikie, Faust29 and 1 other person like this.
  29. Faust29

    Faust29 iMTB Hooligan

    Location:
    irgendwo
    Name:
    B. Bunny
    Current Bike:
    2 SC and a STDM
    @jaime - same experience here as Ross. I thought I was running in the 30 range, but found that the gauge was off by about 3 pounds and I was really around 27. I sprung for a digital gauge, checked it against others, and have been much happier.
     
    Mikie likes this.
  30. UPSed

    UPSed iMTB Hooligan

    Location:
    Simi Valley
    Name:
    Ed Bottorff
    Current Bike:
    Niner Jet 9 RDO
    Can you plus guys @AKAKTM @scottay chime in on air pressures? On the Jet 9 Plus I was running 16 front and 17 rear. Felt like I could go a little lower.
     
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