How to make 2 training wheels from kids bike

2026-08-22

To make a kids’ bike use two training wheels, fit a complete, compatible left-and-right training-wheel kit; do not improvise wheels or brackets from spare bike parts. Measure the bicycle first, compare the kit instructions with its rear axle and frame, and use a bicycle mechanic if compatibility is uncertain.

What to measure before choosing the pair

Record the wheel-size label shown on the bicycle or tire, but do not rely on that label alone. Inspect the rear axle area on both sides and note whether racks, guards, chain covers, cables or other parts occupy the intended mounting space.

Rear axle: Identify its type and measure the usable exposed section on each side.
Mounting area: Check the shape and available clearance around both rear dropouts.
Kit range: Compare the bicycle’s wheel size and axle arrangement with the exact compatibility statement in the training-wheel manual.
Included hardware: Confirm that the kit supplies a matched left and right bracket plus every specified fastener and retaining part.

If the manual does not explicitly cover the bicycle’s configuration, do not assume that a bracket can be bent, drilled, stacked with unrelated hardware or adapted to fit. Ask the kit manufacturer or a qualified bicycle mechanic.

Fit the training wheels as a matched system

Start with the bicycle supported so it cannot fall. Follow the kit manual’s side-specific diagram, hardware order and tightening instructions exactly. Attach both brackets only at the approved mounting points, keep them clear of moving parts, and use the stated torque if the manual provides one. No universal torque or assembly sequence can be given because neither is supplied for a particular kit here.

Compare the two sides before riding. The brackets should be in their intended orientation, the fasteners should be fully engaged as described by the manual, and neither training wheel should rub the tire, chain, spokes or other components. Spin the rear wheel and operate the brakes while the bicycle remains supported. If anything binds, shifts or cannot be assembled exactly as directed, stop and have a mechanic inspect it.

Set and check the support position

Training wheels should assist balance without turning the bicycle into an unstable, improvised four-wheel platform. Use only the height or position permitted by the kit manufacturer. Check the setup on a level surface, looking for an even left-to-right installation and confirming that the bicycle does not lean sharply while stationary.

Do not invent a ground-clearance measurement. The correct position depends on the specific kit and bicycle, so follow its manual. After the initial installation and after early rides, recheck the hardware and alignment at the intervals stated by the manufacturer. Any looseness, cracked or bent bracket, damaged fastener, or unexpected movement requires stopping use until the problem is corrected.

Check that the underlying bike fits the child

Training wheels cannot correct an oversized or poorly controlled bicycle. Have the child try the bike. Prioritize measured height, inseam, comfortable stand-over clearance, reach to the controls, brake operation and present confidence over age alone. Do not choose a larger bicycle merely to allow room for growth.

Wheel size	XBikes starting point
12 Inch	Ages 3–4; 34–40 in / 86–102 cm
14 Inch	Ages 3–6; 37–45 in / 94–114 cm
16 Inch	Ages 4–7; 40–48 in / 102–122 cm
18 Inch	Ages 5–9; 43–52 in / 109–132 cm
20 Inch	Ages 7–12; 48–60 in / 122–152 cm
24 Inch	Ages 10–14; 54–64 in / 137–163 cm
26 Inch	Youth and adults over 60 in / 153 cm

These ranges are starting points, not substitutes for an individual fit check. Any age wording inside a product name is a catalog label rather than proof that the bicycle fits a particular rider.

How the supplied bicycles help with comparison

The catalog options are relevant because they are kids’ bicycles explicitly offered with training wheels across several labeled wheel sizes. They help you compare complete training-wheel-bike options when adapting the current bicycle is incompatible or unclear.

XJD Kids Bike for Girls – Pink, 12/14/16/20 Inch with Training Wheels is listed in 12 Inch, 14 Inch, 16 Inch and 20 Inch options. XJD Pink Girls' Bike – Kids 12/14/16 Inch Training Wheel Bicycle is listed in 12 Inch, 14 Inch and 16 Inch options. Compare the rider’s measurements and control first, then select the corresponding product option for a proper fit check.

These listings do not establish that their training wheels or hardware can be transferred to another bicycle. For compatibility, assembly, maintenance, load limits and torque, consult the exact product manual or a qualified bicycle mechanic.

Make the final safety decision

Before the child rides, confirm that the paired kit is explicitly compatible, both sides match the manual, all moving parts run freely, the bicycle fits, and the child can reach and operate the controls. Use a properly fitting bicycle helmet that sits level, with its straps adjusted according to the helmet manufacturer’s instructions. If any one of those checks fails, do not fabricate a workaround: choose a compatible complete pair or take the bike to a mechanic.