Bridgestone YM

Name: Bridgestone YM Kart Tire
Brand: Bridgestone

Softsprint

Updated 2026-03-01

Performance Specs

Grip

Durability

Wet

70-95°F

Temp Range

Heat Cycles

F: 10-12 psiR: 8-10 psi

Pressure

Available Sizes

Position	Size	Rim Diameter	Tread Width
front	10x4.50-5	5"	4.5"
rear	11x7.10-5	5"	7.1"

Class Compatibility

OK KZ

Sanctioning bodies: CIK-FIA

Overview

The Bridgestone YM is a soft qualifying compound that pairs with the YK race tire in CIK-FIA championships. It delivers maximum grip for timed qualifying sessions and short sprint finals.

Ideal For

CIK-FIA qualifying sessions and short finals where ultimate grip is needed.

Pros

Maximum Bridgestone grip
Purpose-built for qualifying
Excellent one-lap pace

Cons

Very short lifespan
Not intended for full race distance
Premium cost per session

Where to Buy

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Frequently Asked Questions

Is the Bridgestone YM legal for OK?

Yes, the Bridgestone YM is approved for use in the following classes: OK, KZ.

What pressure should I run the Bridgestone YM at?

Recommended starting pressures for the Bridgestone YM are 10-12 psi (front) and 8-10 psi (rear). Adjust based on ambient temperature and track conditions.

How many heat cycles does the Bridgestone YM last?

The Bridgestone YM typically delivers optimal performance for 2 heat cycles. Performance will gradually degrade after this point.

What temperature range is best for the Bridgestone YM?

The Bridgestone YM performs best when tire surface temperature is between 70°F and 95°F.