Parts & Components

About Parts & Components

Every bike starts with a frame, but the right combination of parts and components determines how it rides. From drivetrains that keep shifting crisp under effort to brakes that stay consistent on singletrack, quality components help you build a setup that matches your terrain, goals, and riding style.

1. Bike Build Types: What to Prioritize

Type	Terrain or workload	Core demands	What matters most
Gravity MTB abuse build	Enduro, park, downhill. Long descents, repeated impacts	Heat management, impact resistance, stiffness that does not fold	Brakes (calipers, pads, rotors), fork and shock chassis, wheels and hubs, bars and stems that do not slip, dropper reliability
Trail and XC efficiency build	Climbs, long rides, punchy efforts	Low drag, precise shifting, predictable handling	Drivetrain range and shift quality (cassette, chain, derailleur), wheel weight and engagement trade-offs, tire and wheel compatibility, cockpit fit for leverage
All-weather MTB reliability build	Mud, grit, shoulder seasons, frequent rides	Sealing, wear resistance, quiet function	Consumables (chain, cassette, pads), bearings (bottom bracket, headset), rotors, cables and housings, anything that keeps contamination out
Road endurance and performance build	Pavement miles, sustained speed, long climbs	Efficiency, stable braking, comfort over hours	Drivetrain gearing and steps (often 2x), wheel stiffness and aero trade-offs, brake consistency (disc setup quality matters), contact points (saddle, bar shape, hood position)
Gravel and mixed-surface durability build	Washboard, loose climbs, long remote rides	Durability, tire clearance, traction, field-serviceable choices	Wheels and tires first (width, casing, tubeless reliability), gearing range (often wider than road), brakes (modulation in loose terrain), sealing against dust

2. Bike Part Safety Standards & Certifications

ISO 4210 is the main umbrella safety standard for bicycles and sub assemblies. Use it as a baseline for normal use, not as proof a part is ideal for hard charging.
For brakes, cockpit parts, wheels, and seatposts, the real safety line is correct compatibility and correct torque. A strong part installed wrong still fails.

3. Key Component Features & Trade-Offs

Feature	Benefit	Downside
Larger brake rotors	More leverage and cooling	More weight, more strike risk, can overwhelm weak tires and fork chassis
Metallic pads vs organic pads	Better wet performance and heat tolerance	More noise, more rotor wear, less bite consistency when cold
Wider range cassettes	More climbing gears without walking	Bigger jumps between gears, higher chain wear if shifting under load
Higher end chains	Better shift quality and life	Still dies fast in grit if ignored
More suspension adjustability	Better tuning for traction and support	More ways to be wrong and more maintenance
Carbon vs alloy rims	Stiff, precise handling	Harsher feel for some riders, damage can be less obvious
Higher wheel hub engagement	Faster power pickup in tech climbs	More drag and noise in some designs, more tiny parts to service
Dropper post travel	More room to move on steep terrain	More insertion depth and fit issues, more service needs over time
Bar width and rise	Control and stability	Too wide hurts shoulders and trees. Too low loads wrists and front end

4. Fit, Sizing & Compatibility Checklist

Wheels: Match wheel size and axle standards. Boost spacing is common, but not universal. Check front and rear axle type and spacing before you buy hubs or wheelsets.
Rotors: Confirm rotor attachment (6 bolt vs Center Lock) and rotor diameter your fork and frame are rated to accept.
Drivetrain: Freehub drivers are not universal (HG vs XD vs Micro Spline). Chain, cassette, and derailleur speed counts need to agree.
Bottom brackets: Shell standard matters (threaded vs press fit variants). “Close enough” becomes creaks, bearing death, or both.
Cockpit: Bar clamp diameter (commonly 31.8 or 35) must match the stem. Bar width should match your shoulders and your local tree density.
Seatposts and droppers: Diameter must match your frame. Insertion depth often matters more than advertised travel.
Pedals and cleats: Flats are simple. Clipless adds compatibility between pedals and cleats, plus knee setup consequences if you guess.

5. Care, Maintenance & Component Lifespan

Chains and cassettes: Measure chain wear. Replace early if you want cassettes to last. Drivetrain parts tend to wear as a system, not as individuals.
Brakes: Inspect pad thickness and rotor condition. Bleed hydraulics when lever feel degrades.
Suspension: Service intervals matter because dirty oil turns expensive damping into gritty disappointment. Wipers and seals are wear items.
Wheels: Check spoke tension periodically, especially after hard hits. Small changes become cracked rims if ignored.
Bearings and pivots: Grit and pressure washing kill them fast. Clean gently, keep seals intact, replace before play becomes damage.
Torque: Many failures are just over tightening or under tightening. Use a torque wrench where the bike maker tells you to.

Parts & Components

OneUp Components Composite Flat Pedals

TRP EVO PRO MTB Hydraulic Disc Brake and Lever

SRAM HS2 Disc Brake Rotor

Cane Creek Forty Complete Headset

Chromag Trailmaster LTD Saddle

TRP RS01E Disc Brake Rotor

OneUp Components V3 Dropper Post

Muc-Off Tubeless Rim Tape

Selle Italia SLR Boost TM Superflow Saddle

Crankbrothers Stamp 1 Gen 2 Pedals

Race Face Atlas MTB Pedals

Shimano Alivio BL-MT200/BR-MT200 Brake Lever/Caliper

Peaty's x Chris King MK2 Tubeless Valves

Stan's NoTubes Tubeless Rim Tape

SRAM PC-GX Eagle Chain

ODI Elite Pro Lock-On MTB Grips

OneUp Components V2 ISCG05 Bash Chain Guide - 1C0612

OneUp Components V2 Carbon MTB Handlebar

SRAM DUB BSA Bottom Bracket

DT Swiss FR 541 Rim

Ergon Mens SMC Sport Gel Saddle

SQlab 411 Inner Bar Ends

WTB Volt MTB Saddle

Axiom Flascheguard Fender Set

SRAM GX Eagle Rear Derailleur - 00.7518.137.000

SRAM XG-1275 Eagle Cassette

SRAM PC-XX1 Eagle Chain

Race Face Chester MTB Pedals

RockShox Front Fork 200 Hour Service Kit

DT Swiss 350 Classic Rear MTB Hub

Crankbrothers Stamp 7 MTB Pedals

Muc-Off V2 Tubeless Presta Valve

Gates Carbon Drive CDX Belt

Surly Moloko Handlebar

Cane Creek Fifty Complete Headset

OneUp Components Clip Pedals

SRAM GX Eagle DUB Groupset

TRP S05E Race Disc Brake Rotor

KMC X11 Chain

KMC X10 Chain

Hope Floating 6-Bolt Disc Brake Rotor

Lizard Skins DSP V2 Bar Tape

North Shore Billet Talon Crankarms

Chromag Dagga MTB Pedals

ODI Reflex V2.1 Lock-On MTB Grips

Chromag Ally Rim

SDG Bel-Air V3 Seat

Marzocchi Bomber CR MTB Rear Shock

About Parts & Components

1. Bike Build Types: What to Prioritize

Type

Terrain or workload

Core demands

What matters most

Gravity MTB abuse build

Enduro, park, downhill. Long descents, repeated impacts

Heat management, impact resistance, stiffness that does not fold

Brakes (calipers, pads, rotors), fork and shock chassis, wheels and hubs, bars and stems that do not slip, dropper reliability

Trail and XC efficiency build

Climbs, long rides, punchy efforts

Low drag, precise shifting, predictable handling

Drivetrain range and shift quality (cassette, chain, derailleur), wheel weight and engagement trade-offs, tire and wheel compatibility, cockpit fit for leverage

All-weather MTB reliability build

Mud, grit, shoulder seasons, frequent rides

Sealing, wear resistance, quiet function

Consumables (chain, cassette, pads), bearings (bottom bracket, headset), rotors, cables and housings, anything that keeps contamination out

Road endurance and performance build

Pavement miles, sustained speed, long climbs

Efficiency, stable braking, comfort over hours

Drivetrain gearing and steps (often 2x), wheel stiffness and aero trade-offs, brake consistency (disc setup quality matters), contact points (saddle, bar shape, hood position)

Gravel and mixed-surface durability build

Washboard, loose climbs, long remote rides

Durability, tire clearance, traction, field-serviceable choices

Wheels and tires first (width, casing, tubeless reliability), gearing range (often wider than road), brakes (modulation in loose terrain), sealing against dust

2. Bike Part Safety Standards & Certifications

3. Key Component Features & Trade-Offs

4. Fit, Sizing & Compatibility Checklist

5. Care, Maintenance & Component Lifespan

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