RockLite Wheel Inserts — 1.3"

$10.00

In stock — ships in 1-2 business days

Foamed wheel inserts engineered for consistent sidewall support and predictable rebound. Sold as a pair.

A pair is one axle. Front and rear do different jobs, so you can order a different spoke count or durometer for each — add one pair for the front and another for the rear. Two pairs covers the truck. Mixing durometers across axles — softer up front for grip, firmer at the rear for drive — is exactly what the pair split is for.

Spoke Count is the number of chevron arms — and the number of grip grooves on the outer edge, which always match. Fewer arms give more compliance; more arms hold shape under load.

Insert size is set by your wheel and tire together: the wheel determines the hub the insert seats on, the tire determines the cavity it fills. Use the finder above, or see the measuring guide.

Custom durometers and dual-stage builds — firmer outer half for sidewall support, softer inner half for climbing — are available on request. Ask us.

Find your fit Wheel sets the hub · tire sets the size

1 — Your wheel

Don’t see your setup? Measure it yourself, or request a custom size — including custom durometers and dual-stage builds.

Spoke Count Structural flex

16-Spoke

Insert Hub × cavity, mm

36 mm hub x 12 mm / 20 mm wide / 59 mm tall 43 mm hub x 9.95 mm / 14 mm wide / 64 mm tall

Durometer Material firmness

81A Soft 86A Medium 91A Hard

SKU: RL-13-16-81A-H36x12-W20-T59
Bead seat: 74 mm
Material: Foamed TPU
Quantity: Pair (2 inserts)
Origin: Made in Texas, USA

How to choose

Spoke Count is the number of chevron arms in the ring — and the number of grip grooves on the outer edge, which always match. Fewer arms span further and give more compliance; more arms shorten the unsupported span and hold shape under load. It does not affect fit.

18 Most compliant — technical crawling, low speed
24 Balanced — general trail use
30 Most supportive — higher speed, heavier rigs

Durometer sets material firmness, independent of spoke count.

75A Soft — maximum grip and rebound
85A Medium — everyday balance
95A Firm — sidewall support, resists rollover

Insert size is set by two things together. Your wheel determines the hub the insert seats on — diameter and width. The insert is rigid and will not compress onto a narrower hub, so this has to match. Your tire determines the cavity the insert fills — its overall width and height.

Use the finder above and both are chosen for you, or measure them yourself.

Need a custom durometer, or a dual-stage build with a firmer outer half for sidewall support and a softer inner half for climbing? Ask us — we build to spec.