150/145mm Travel
29" x 2.5" Wheels
1x12 Speed SRAM AXS
EP-801 Shimano Motor
85Nm Torque
720Wh Battery
from 20.9kg
The best kids bike size is the one your child can control today, not the biggest bicycle they might grow into. Start with height and inseam, then check saddle height, reach, braking and confidence on the actual bike. Age is useful for browsing, but two children of the same age can need very different fits. Explore our kids bikes collection with those measurements ready.
How to measure your child for a bike
Measure height and inseam separately
Measure height standing upright without shoes. For inseam, have your child stand against a wall with feet slightly apart. Place a book gently between the legs, level with the floor, and measure from the floor to its upper edge. Repeat once to catch mistakes. Record both measurements rather than relying on a clothing size.
Inseam helps you assess ground contact and clearance. Height helps narrow the search, but neither measurement tells you everything about reach. Arm length, torso proportions and riding experience also matter. Check the specific model’s size guidance and minimum saddle height before ordering.
Kids bike wheel sizes: 12 inches to 26 inches
Wheel size describes the wheels, not the complete fit. Different frames with identical wheels can have different saddle ranges and handlebar positions. The comparison below is a starting point, not a universal age or height chart.
| Wheel size | Typical shopping situation | What to check |
|---|---|---|
| 12-inch | Smallest-bike stage | Ground contact and low saddle position |
| 14-inch | Early pedal-bike shortlist | Reach and easy starts |
| 16-inch | Developing independent riding | Brake reach and steering control |
| 20-inch | Longer rides and possible gearing | Frame clearance and shifting simplicity |
| 24-inch | Progressing youth riding | Confident stops and manageable weight |
| 26-inch | Larger youth-bike options | Actual frame fit, not wheel size alone |
Small pedal bikes
Compare the Skid 14 (New Gen) and Skid 16 (New Gen) as different starting points, not automatic recommendations based on a birthday. Their product descriptions highlight small frames and chainguards. Your child still needs to demonstrate comfortable ground contact, reach and braking.
Moving into larger wheels
The Spyke 20 (New Gen) introduces a youth mountain-bike option with a seven-speed drivetrain. The Spyke 24 SE (New Gen) is another step in the wheel-size range. For larger riders, consider the Spyke 26 8spd (New Gen), checking current specifications and fit carefully rather than assuming every 26-inch bicycle suits a teenager.
Five fit checks before you buy
1. Ground contact and starting
A beginner should be able to put feet down confidently at the learning saddle setting. Watch a start and stop without lifting or balancing the bicycle for them. More experienced riders may use a higher pedalling position, but that adjustment must not remove their ability to stop safely.
2. Frame clearance
Ask your child to stand over the bike in riding shoes. They should be comfortable stepping off the saddle, without the frame pressing into them. Check the manufacturer’s guidance for that design rather than applying one universal clearance number.
3. Handlebar reach
Shoulders should look relaxed, with a little bend at the elbows. Excessive stretching, locked arms or sliding forward on the saddle suggest the fit needs attention. Being able to touch the handlebars is not enough.
4. Brake control
Check that your child can reach and squeeze the brake levers while maintaining a secure grip. Test stopping at walking speed in a protected area. Have a qualified mechanic adjust the controls if necessary.
5. Handling and weight
Can your child turn, walk the bicycle and recover from a wobble? Compare manageable options within the Kids Bikes & Accessories collection. Accessories add weight too, so assess the complete riding setup.
Buying advice: choose control over growing room
If your child sits between sizes, try both rather than automatically choosing the larger bicycle. For example, revisit the Skid 16 (New Gen) if a bigger option makes starting awkward. Compare the Spyke 20 (New Gen) only when reach, stopping and frame clearance are all comfortable. More equipment cannot compensate for poor fit.
After purchase, keep the bike easy to control with regular checks. Our German-language bicycle maintenance guide covers ongoing care. Recheck saddle position as your child grows and after any component adjustment.
Frequently asked questions
Can I choose a bike by age alone?
No. Use age to narrow your search, then confirm height, inseam, model guidance and practical fit. Confidence and braking ability matter just as much.
Should I buy one size bigger?
Not if your child struggles to reach, start or stop. Useful adjustment range is different from a bicycle that is already too large.
Does a 24-inch bike always fit better than a 20-inch bike?
No. Wheel diameter does not determine frame geometry. Compare the actual saddle range, reach and handling of each candidate.
What if the size information is unclear?
Request the minimum saddle height, recommended rider measurements and fitting advice for the exact model. Do not substitute a generic chart for missing specifications.
