Roscoe 9


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Color: Matte Quicksand to Olive Fade/Black

  • Matte Quicksand to Olive Fade/Black

Size: Medium/Large

  • Medium/Large
Out of stock
  • The Roscoe 9 is our best all-mountain alloy hardtail, built for lap after lap of grin-inducing fun. A 140 mm FOX Rhythm 36 fork, powerful 4-piston brakes and a fast-and-grippy wheel and tyre combo deliver incredible capability whether you're nailing jumps or picking through gnarly rock gardens.


    1. 29er wheels and wide 2.6" tyres make for a grippy, confident and fast-rolling ride
    2. Bigger, stiffer 36 mm fork stanchions won't flex, so you can push harder with more precise, confident steering that helps you stay on your line
    3. The FOX fork's air spring can easily be adjusted for a specific rider weight, and it's lighter than a coil spring
    4. The dropper post lets you lower your saddle on the fly so it's out of the way on descents


  • *spec applies to all sizes unless listed separately

    Frame Alpha Gold Aluminium, tapered head tube, internal derailleur & dropper post routing, ISCG 05, threaded BB, Boost148, 12 mm thru axle
    Fork Fox Rhythm 36, Float EVOL air spring, GRIP damper, tapered steerer, 44 mm offset, Boost110, 15 mm Kabolt axle, 140 mm travel
    Max compatible fork travel 150mm, XS: 120mm
    Hub front Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15 mm thru axle
    Hub rear Bontrager alloy, sealed bearing, 6-bolt, Rapid Drive 108, Shimano MicroSpline freehub, Boost148, 12 mm thru axle
    Skewer rear Bontrager Switch thru-axle, removable lever
    Rim Bontrager Line Comp 30, Tubeless-Ready, 28-hole, Presta valve
    Tyre Bontrager XR4 Team Issue, Tubeless Ready, Inner Strength sidewalls, aramid bead, 120 tpi, 29 x 2.60"
    Tyre part Bontrager TLR sealant, 180 ml/6 oz
    Rim strip Bontrager TLR
    Max tyre size Frame: 29x2.60" (XS: 27.5x2.60"), Fork: See manufacturer
    Shifter Shimano SLX M7100, 12-speed
    Rear derailleur Shimano XT M8100, long cage
    *Crank Size: S, M, M/L, L
    E*thirteen Helix, 30T steel ring, 73 mm spindle length, 52 mm chainline, 170 mm length
    Size: XL
    E*thirteen Helix, 30T steel ring, 73 mm spindle length, 52 mm chainline, 175 mm length
    Bottom bracket Shimano SM-BB52, 73 mm, threaded external bearing
    Cassette Shimano SLX M7100, 10-51T, 12-speed
    Chain Shimano Deore M6100, 12-speed
    Max. chainring size 1x: 32T (52mm chainline), 36T (55mm chainline)
    Saddle Bontrager Arvada, hollow chromoly rails, 138 mm width
    *Seatpost Size: S
    TranzX JD-YSP18, 100 mm travel, internal routing, 31.6 mm, 361 mm length
    Size: M
    TranzX JD-YSP18, 130mm travel, internal routing, 31.6 mm, 425 mm length
    Size: M/L, L, XL
    TranzX JD-YSP18, 150 mm travel, internal routing, 31.6 mm, 470 mm length
    *Handlebar Size: S
    Bontrager Line, alloy, 35 mm, 27.5 mm rise, 750 mm width
    Size: M, M/L, L, XL
    Bontrager Line, alloy, 35 mm, 27.5 mm rise, 780 mm width
    Grips Bontrager XR Trail Comp, nylon lock-on
    *Stem Size: S
    Bontrager Elite, 35 mm, 0-degree, 35 mm length
    Size: M, M/L, L, XL
    Bontrager Elite, 35 mm, 0-degree, 45 mm length
    Head set FSA IS-2, 1-1/8" top, 1.5" bottom
    *Brake Size: S, M, M/L, L, XL
    Shimano M6120 4-piston hydraulic disc
    Size: S, M, M/L, L, XL
    Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper
    *Brake rotor Size: S, M, M/L, L, XL
    Shimano RT66, 6-bolt, 180 mm
    Size: S, M, M/L, L, XL
    Shimano RT66, 6-bolt, 203 mm
    Rotor size Max brake rotor sizes - Frame: 180mm, Fork: see fork manufacturer
    Weight M – 28.95 lb / 13.13 kg (with TLR sealant, no tubes)
    Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).


    **Trek Bikes reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing.

    **Weights are based off pre-production products at time of publication. Weights may vary in final production.

  • Size

    Rider Height



    145 - 155 cm

    4'9" - 5'1"

    69 - 73 cm

    27" - 29"


    155 - 165 cm

    5'1" - 5'5"

    74 - 78 cm

    29" - 31"


    165 - 176 cm

    5'5" - 5'9"

    79 - 83 cm

    31" - 33"


    173 - 180 cm

    5'8" - 5'11"

    81 - 86 cm

    32" - 34"


    177 - 188 cm

    5'10" - 6'2"

    84 - 89 cm

    33" - 35"


    188 - 195 cm

    6'2" - 6'5"

    89 - 91 cm

    35" - 36"


    195 - 203 cm

    6'5" - 6'8"

    91 - 97 cm

    36" - 38"


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