Start on a hardtail (front suspension only), wear at least a helmet and gloves, and ride the easiest-rated trails near you until they feel boring. Trail difficulty is usually shown with symbols such as the green circle, blue square and black diamond of the IMBA system, but trail centers can use their own grading, so check the local key before you ride.
Hardtail or full suspension for a first bike
A hardtail has a suspension fork at the front but no rear shock; a full-suspension bike has both. Trek describes the difference this way: “Hard tail mountain bikes do not feature a rear shock, whereas full suspension bikes feature front and rear shocks.”
Trek lists the hardtail’s strengths as being more efficient while pedaling, faster on climbs and smooth trails, lighter, simpler to maintain and a good fit for beginners and easier terrain. For full suspension it lists speed on difficult trails with lots of obstacles, stability in bumps and descending, and an “instant confidence boost for beginners”. The practical rule: match the bike to the trails within a short drive of home. Smooth gravel and rolling singletrack suit a hardtail; if your local trails are rocky, rooty or steep, full suspension is worth the extra cost and upkeep.
Whichever you choose, buy from a shop that will size and set up the bike for you. Our guide to mountain bike suspension explains sag and fork settings, and road bike vs hybrid vs mountain bike helps if you are not sure a mountain bike is the right type at all.
Protective gear
- Helmet: essential on every ride. Wikipedia notes that “a helmet and gloves are usually regarded as sufficient for the majority of non-technical riding.” See how helmets work and how to choose one. Wikipedia advises that a helmet involved in an accident should be replaced promptly, even if it does not appear to be visibly damaged.
- Gloves: they can protect against superficial hand injuries, including when you put a hand out in a fall. More in do you actually need cycling gloves.
- Knee pads: optional on easy trails, but a sensible addition as terrain gets steeper or rougher. For downhill riding, minimum protection is gloves, knee pads and a full-face helmet.
- Eye protection: glasses keep dust, mud and branches out of your eyes.
Reading trail ratings
The IMBA (International Mountain Bicycling Association) system describes each level by trail width, tread and the height of unavoidable obstacles. Its levels run from white circle (easiest) through green circle, blue square and black diamond to double black diamond. Figures below come from the IMBA table as reproduced on the OpenStreetMap wiki.
| Rating | Minimum trail width | Unavoidable obstacle height | Tread |
|---|---|---|---|
| Green circle (easy) | 0.9 m (36 in) | 5 cm (2 in) or less | Firm and stable |
| Blue square (more difficult) | 0.6 m (24 in) | 20 cm (8 in) or less | Mostly stable with some variability |
| Black diamond (very difficult) | 0.3 m (12 in) | 38 cm (15 in) or less | Widely variable |
The table shows why a first ride belongs on green: obstacles you cannot avoid are no taller than 5 cm, and the trail is wide enough to correct a mistake. A blue trail in one park may feel harder than a blue trail in another, so look at the trail map, ask at the trailhead or a bike shop, and turn back at any feature you are not comfortable with. Walking a section is always fine.
Progress when green trails feel easy and relaxed, not on a timetable. How quickly that happens varies widely with fitness, how often you ride and whether you get coaching.
Basic technique before the trail
- Look ahead. Your bike goes where your eyes go; look several bike lengths down the trail, not at the front wheel.
- Attack position. On rough ground, stand on level pedals with bent elbows and knees so your body absorbs bumps instead of the bike bucking you.
- Use both brakes smoothly and finish braking before corners and obstacles, not in them.
Keep tires at a sensible pressure for the terrain; see tire pressure. If brakes feel weak or spongy, or you see a cracked frame, fork or wheel, stop riding and have a bike shop inspect it before you go out again.
Where to ride
Purpose-built trail centers and local park systems with a posted rating system are the best starting places, and many have rental bikes so you can try before you buy. Ride with someone more experienced when you can, tell someone your route, and carry a spare tube, pump and phone.
Sources
- OpenStreetMap Wiki: Key:mtb:scale:imba (IMBA Trail Difficulty Rating System)
- Trek Bikes: Hard Tail vs. Full Suspension
- Wikipedia: Mountain biking
Last reviewed: October 2026.