2026 Rocky Mountain Instinct Alloy 50

Archived: 2026 Rocky Mountain Instinct Alloy 50 · Mountain · Published sizes: XS, S, M, L, XL

• Confirm the frame markings and seller description match this archived model. Note every component that differs from the published build.
• Record the frame serial number. It should be legible, unaltered and consistent with the seller’s ownership history.
• Find the size marking on the bicycle and confirm the fit before judging the condition or price.

Archived: Frame: FORM™ Alloy | Full Sealed Cartridge Bearings | Press Fit BB | Internal Cable Routing | 2-Bolt ISCG05 Tabs | RIDE-4™ Adjustable Geometry | 2 Position Axle | SM - XL = 145mm | XS = 140mm | FORM™ Alloy Rear Triangle · Fork: RockShox Lyrik Select 160mm | Charger RC Damper | 27.5 = 37mm Offset | 29 = 42mm Offset

• Look for dents or shape changes and inspect the edges of welds around the head tube, bottom bracket, seat cluster and suspension mounts for hairline cracks.
• Stand behind and in front of the bicycle to look for obvious frame, fork or wheel misalignment. Ask directly about crashes, transport damage and repairs.

Archived: Fork: RockShox Lyrik Select 160mm | Charger RC Damper | 27.5 = 37mm Offset | 29 = 42mm Offset · Rear shock: RockShox Super Deluxe Select | Linear XL Air Can | Sealed Bearing Eyelet | 20x8mm F Hardware | XS - SM = 190x45mm | MD - LG - XL = 210x55mm | Size-Specific tune in FAQ

• Inspect the fork stanchions for scratches or coating wear, look for oil or dirt rings at the seals, and cycle the fork through its travel while checking for binding or bushing play.
• Inspect the shock shaft and seals, cycle the rear suspension through its travel and check for oil, air loss, binding or unusual top-out and bottom-out noises.
• Hold the rear brake and load the suspension from several directions. Check pivots, bearings and mounting hardware for knock, looseness or side play.
• Ask for dated fork, shock and pivot-service records. A clean exterior does not establish the condition of internal seals, oil, bushings or bearings.

Archived: Shifters: Shimano XT · Rear derailleur: Shimano XT · Crankset: Shimano Deore | 32T | 24mm Spindle | Crankarm Length: XS - SM = 165mm | MD - XL = 170mm · Bottom bracket: Shimano SM-BBMT500 · Cassette: Shimano XT 10-51T · Chain: Shimano M6100

• Shift through every available gear under light load. Hesitation, skipping or inconsistent indexing can reflect wear, damage, poor adjustment or mismatched replacement parts.
• Measure chain wear with a compatible gauge and inspect chainring, cassette or freewheel teeth. A new chain does not rule out wear in the remaining drivetrain.
• Turn the cranks slowly, feel for rough bearings and check for side-to-side play. Inspect crank arms, chainring bolts and pedal threads for looseness or damage.

Archived: Brakes: Shimano XT Trail 4 Piston | Metal Pads

• Inspect pads and braking surfaces, check the complete cable or hose path, and confirm both controls feel consistent and return cleanly.
• Before riding, test every installed brake separately at walking speed. Each should stop firmly and release cleanly without its control reaching the end of its usable travel.

Archived: Wheel size: 27.5"; 29" · Rims: WTB KOM Team i30 TCS 2.0 | 28H · Hubs: Front: Shimano TC500 | 15mm Boost; Rear: Shimano TC500 Boost 148mm · Front tire: Maxxis Minion DHF 2.5 WT 3C MaxxTerra EXO+ Tubeless Ready · Rear tire: Maxxis Minion DHR II 2.4 WT 3C MaxxTerra EXO+ Tubeless Ready

• Spin both wheels and watch for side-to-side and vertical movement. Check spoke tension, rim condition and hub play.
• Inspect both tire casings for cuts, cracking, plugs, bulges or exposed threads and confirm the installed sizes are safe for the rims and available frame and fork clearance. This record indicates different front and rear wheel diameters, so verify each tire at its correct end.
• Remove and reinstall or closely inspect both wheel-retention systems. Axles or quick releases should tighten correctly with undamaged threads, hardware and dropouts.
• Confirm whether the bike is actually set up tubeless, whether both tires hold pressure, and when sealant and rim tape were last serviced.

Archived: Handlebar: Rocky Mountain AM | 780mm Width | 25mm Rise | 9° Backsweep | 5° Upsweep | 35 Clamp · Stem: Rocky Mountain 35 AM | 0° Rise | All Sizes = 40mm · Seatpost: Tranz X +RAD1.0 Adjustable Dropper Post | 30mm Adjustment | Alloy Clamp Lever | 30.9mm | XS = 125mm | SM = 150mm | MD = 170mm | LG - XL = 200mm · Saddle: WTB Volt Race 142 | Cromoly rails

• Apply the front brake and rock the bike to check for headset play or notchiness. Inspect the stem, handlebar and clamp zones, then confirm every fastener and control is secure.
• Cycle the dropper post repeatedly. It should reach full travel, remain extended under load and have no unusual oil, excessive rotational play or damaged remote, cable, hose or battery.

• Before riding, confirm both wheels are secure, tires are safe, both brakes function, and the headset, handlebar, stem, cranks and pedals have no looseness.
• Begin at low speed. Test steering, braking and shifting progressively, then load the drivetrain and suspension only after the basic safety checks pass.
• Listen and feel for repeated knocks, grinding, skipping, brake pulsation or movement at joints. Stop the test if the bicycle cannot be controlled safely.