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An XKIDS coach guiding a young rider beside the ramp during an outdoor coaching moment.
XKIDS Performance LabXKIDS Performance Lab

Your child's riding may not be a skill problem — it may be a bike fit problem.

Tell us about your child and their bike. Our technician will review first. Usually it's an adjustment, not a repair order.

We assess first, then advise. No repair order upfront.

Let's check the bike first

Choose by job, not by lab name.

Find the right size

Height, age, riding path — get one starter fit report.

Open Fit Finder
Calculate BMX gearing

Chainring, cog, gear inches, rollout, compare, and reverse finder.

Open BMX Gear Lab
Check a bike

Safety, fit, repair, upgrade, or race-day readiness triage.

Open Bike Check
Save rider historyAccount needed

Children, bikes, gear, race results, events, and same-track progress.

Open Family Hub
Explore by discipline

Where does your child ride?

BMX Racing

Gear ratio, rollout, crank fit, and race-day setup.

BMX Racing tools
Balance Bike

Seat height, readiness milestones, and growth tracking.

Balance Bike tools
MTB

Bike fit, brake reach, and trail readiness.

MTB tools
Know roughly what to expect

Service Reference Pricing

  • Quick CheckNot sure what's wrong — let a technician take a look
    From $19
  • Safety + Fit CheckNew bike, after a crash, feeling unstable, or starting training
    From $49–$69
  • Race Day PrepBefore a BMX, MTB, or balance bike event
    From $89
  • Full Kids Tune-UpRegular rider, training, racing, or long overdue
    From $129
  • Racing Season SupportFull-season racing family needing ongoing support
    $199 / season+

Prices above are starting references. Parts are not included unless noted. If additional repairs, parts, or out-of-scope work are needed after the check, we'll explain why and confirm costs with you before doing anything.

Start Bike Check

Common questions

I don't know which service to choose.

Choose "Not sure — please recommend." We'll suggest based on your situation.

Are parts included in the packages?

Parts are not included unless stated. We explain and confirm before any parts work starts.

Is Racing Season Support unlimited service?

No. It includes a limited number of scheduled checks and basic adjustments.

Will you recommend upgrades I don't need?

No. If an upgrade isn't needed yet, we'll tell you directly.