Suspension or Rigid Fork? How to Choose a Kids Mountain Bike That Isn’t Too Heavy
Once a child moves up to 20", 24" or 26" wheels, kids bikes stop being one-size-fits-all. Some come with a suspension fork, some with a rigid fork, some with hydraulic disc brakes and some with V-brakes, and the weights can differ by several kilos. It's easy to assume more features means a better bike, but for a young rider that isn't always true. Here's how we help families choose a junior mountain bike that suits how their child actually rides.
Why weight matters more on a kids bike
A 10kg bike feels light to an adult, but a 30kg child is pushing, lifting and steering something a third of their own body weight. A lighter bike is easier to pedal uphill, easier to pick up after a tumble and easier to control on a narrow path. That usually means more confidence and longer rides before they get tired.
The difference is real even within one brand. Scott's own figures put the rigid-fork Scott Contrail 200 20" at 7.9kg, while the suspension-fork Scott Roxter 200 20" is 9.9kg. On 26" wheels, the rigid Scott Scale 600 is listed at 10.5kg and the suspension Scott Roxter 600 at 12.3kg. Neither choice is wrong, but it's worth knowing what you're trading.
Suspension fork or rigid fork?
A suspension fork soaks up roots, rocks and rough tracks, and it can help a child keep their front wheel on line when they start riding proper trails. The catch is weight, and on a kids bike the fork usually has a softer spring and shorter travel than an adult's, so it does less of the work you might expect.
A rigid fork usually makes more sense if your child mostly rides to school, around the park, on gravel paths and sea-wall tracks, or on family rides. The bike will be lighter, quicker to pedal and has less to look after.
A suspension fork earns its place if they're already riding woodland singletrack, small jumps or rooty, rocky trails, ideally with an adult who rides too. The Roxter 200 uses an SR Suntour fork with 63mm of travel and a softer spring for lighter riders, and the Roxter 600 steps up to 80mm.
A quick tip: if a child can't push the fork down by leaning on the bars, it isn't doing much for them. Ask us and we'll check it on the shop floor with them sitting on the bike.
Hydraulic disc brakes or V-brakes?
Good brakes matter more than almost anything else, and kids bikes now often have brake levers designed for small hands.
- Hydraulic disc brakes need the lightest pull at the lever and keep working well in the wet and mud. The Scott Scale and Roxter bikes we've mentioned all use Tektro hydraulic discs with short-reach levers.
- V-brakes (rim brakes) are lighter, cheaper and simple to adjust, and they're fine for everyday riding in the dry. The Contrail 200 uses kids-specific Tektro levers, which is why it stays so light. Expect them to need adjusting more often as the pads wear.
Whatever brakes the bike has, check your child can reach and squeeze both levers with their hands on the grips. We'll adjust the lever reach for them before they leave.
How many gears does a child need?
More isn't always better. A single shifter with seven or eight gears and a wide-range cassette is plenty for most young riders, and it's much easier to learn than two shifters. Look at the largest rear sprocket: the Scale 600 and Roxter 600 use an 11-40T cassette, which gives an easier climbing gear than the 11-34T on the 20" and 24" bikes.
Twist shifters on the grip, like the Shimano Revo shifters on the Scott range, tend to be easier for small hands than thumb triggers.
Junior mountain bikes we'd look at
A few examples from our range that show the different approaches. Stock varies by size and colour, so call ahead before you visit.
- Scott Contrail 200 Blue 20": rigid fork, 7 gears, V-brakes and 7.9kg. A great lightweight all-rounder for kids from around 115cm.
- Scott Roxter 200 Orange 20": 63mm suspension fork, hydraulic disc brakes and 7 gears, for kids from around 115cm who are already heading off-road.
- Scott Scale 400 Green 24": rigid fork with hydraulic disc brakes and 8 gears at 9.8kg. Strong brakes without the weight of suspension, for kids from around 125cm.
- Python Elite Boys 24" Blue: alloy frame, 8-speed Shimano gears and V-brakes at 10.5kg. A good-value everyday bike.
- Scott Scale 600 Alloy Silver 26": rigid fork, hydraulic discs and an 11-40T cassette for easier climbing, for kids from around 135cm.
- Scott Roxter 600 Brown 26": 80mm suspension fork and hydraulic discs, for confident riders from around 135cm who want to ride trails with friends.
- Cube Acid 260 Disc FE Lizard 26": Suntour suspension fork, disc brakes and 16 gears, with mudguards, lights and a kickstand fitted as standard. Cube lists it at 15.8kg, so it suits older kids who want one bike for school runs and weekend trails.
If you're still working out which wheel size they need, start with our kids bike size guide, then come back to this page to choose the type of bike.
A simple way to decide
- Where will they ride most? Roads, paths and parks point to a light rigid bike. Woods and trails point to suspension.
- Can they lift it? If they struggle to pick the bike up or wheel it around, it's probably too heavy for them to enjoy.
- Can they work the brakes and gears? Both levers should be within easy reach, and the shifter should be easy to use.
- Do they need extras? Mudguards and lights make a big difference for winter school runs, and a bike that comes with them saves fitting them later.
Try them side by side in our shop
The quickest way to choose is to let your child sit on a rigid bike and a suspension bike back to back. Our team can set the saddle height, brake levers and fork for them on the spot. Browse our kids bikes and kids helmets online, then pop in or call to check stock.
Find us at Les’s Cycles, 365 Long Road, Canvey Island, Essex SS8 0JQ, call 01268 695877 or email sales@lescycles.co.uk.