All guides6 guides in this category

Frames

The frame is the part of a bike you keep longest, so getting it right matters. This section covers the decisions that shape how a bike rides long before you think about components: what it is made from, how its geometry is arranged, and whether it fits you.

Two of these choices do more than the rest. Geometry decides how a bike climbs, corners and descends, and reach and stack decide whether it fits your body. Frame material matters too, but less than the marketing suggests: two frames of different materials with the same geometry and tyres will feel far more alike than most riders expect.

You will find guides on frame materials, geometry, sizing, the hardtail-versus-full-suspension question, and how to protect a frame once you have it. Where a number matters, such as head angle or reach, we explain what changing it does rather than just repeating the spec sheet.

Whether you are buying a complete bike or building one up, work through the sizing guide first and the material guide second. Getting the fit right means every other upgrade pays off; getting it wrong means no component can rescue the ride. A frame that suits your trails will keep you happy for years, long after any component has worn out or been upgraded.

Quick answers

More questions →
Does frame material really matter?

It matters for weight, cost, durability and feel, but geometry, tyres and fit change how a bike rides more. Choose the material your budget allows after you get geometry and sizing right.

What is the most important geometry number?

Reach and head angle. Reach sets how roomy and stable the bike feels; head angle sets how quickly it steers versus how stable it is at speed.

How do I choose a frame size?

Compare reach and stack between bikes rather than trusting the size label. Your proportions matter as much as your height, so a demo ride is worth more than a chart.

Hardtail or full suspension for a beginner?

A hardtail is cheaper, simpler and builds skill; full suspension is more comfortable and confidence-inspiring on rough descents. Choose by your trails and budget.

Is frame protection worth it?

For rocky trails, yes, at least a chainstay guard and down tube tape. It is especially worthwhile on carbon frames, where impacts can do more than cosmetic damage.

Explore related categories

  • Riding & PositionFit, posture and technique that make long rides easier.
  • Gear & TiresHelmets, tools, tyres and the kit that earns its place on the trail.
  • MaintenanceShort, repeatable habits that keep the bike quiet and reliable.
  • Clothing & OuterwearLayering, shorts, pants and shells for real mountain weather.

The Trail Dispatch

One short email a month: a new guide, a maintenance reminder, and the gear question we keep getting asked. No spam, unsubscribe any time.