The MRT Tires Rocky RX is an 8-ply UTV rock crawling tire with Nycore belted construction, built for steep, technical rock where grip decides the line. It comes in 32, 35 and 37-inch sizes for 15-inch rims, in a medium or super sticky compound.
It carries a 22.5/32-inch tread depth and is backed by MRT's 1 Year Sidewall Warranty.
Key Features
- 8-ply Nycore belted construction for puncture resistance and sidewall strength
- 22.5/32-inch tread depth
- Medium compound (durometer 55) or super sticky compound (durometer 50)
- 32, 35 and 37-inch sizes for 15-inch rims
- Backed by MRT's 1 Year Sidewall Warranty
Built To Solve: UTV Tires Slipping on Rock Faces and Technical Climbs
- Tires that slide on smooth or angled rock
- Sidewall pinches and punctures on sharp ledges
- Needing more grip without moving off 15-inch wheels
Best For: Rock Crawlers and Technical Trail Riders
- Rock crawlers who want a super sticky compound
- Technical trail riders who want a medium compound that wears longer
- Owners running 15-inch rims and 32 to 37-inch tires
Specifications
- 32x10R15: 45.6 lbs, medium or super sticky
- 35x10R15: 54.8 lbs, medium or super sticky
- 37x11R15: 58 lbs, super sticky
- Tread depth: 22.5/32 in
- Compounds: medium (durometer 55), super sticky (durometer 50)
- Construction: 8 ply, Nycore belted
- Warranty: MRT 1 Year Sidewall Warranty
- Manufacturer Part Numbers: MRT-RX3210555F6, MRT-RX3210545F6, MRT-RX3510555PR, MRT-RX3510545PR, MRT-RX3711545PR
Fitment
Fits UTVs running 15-inch rims with clearance for a 32, 35 or 37-inch tire.
MRT tires are sold individually and fit by rim diameter, not by vehicle make or model. Confirm your rim diameter, the width your rim supports, and the tire clearance your machine has at full suspension compression and full steering lock before ordering. Fitment is not guaranteed on unlisted applications.
FAQ
Why do my tires slip on rock climbs?
Harder compounds lose grip on smooth rock. The Rocky RX uses a sticky compound designed for traction on rough and steep rock.
Medium or super sticky?
Medium (durometer 55) suits versatile all-condition riding. Super sticky (durometer 50) gives maximum grip when the terrain demands it.
What is Nycore?
It is MRT's belted construction, which MRT says adds puncture resistance and sidewall strength.
What sizes are available?
32x10R15 and 35x10R15 in medium or super sticky, and 37x11R15 in super sticky.
Should a shop mount 37-inch tires?
Yes. Large tires are much easier on a tire machine. Balance before riding.
Rocky RX or Rocky?
The Rocky RX is an 8-ply Nycore rock-crawling tire for 15-inch rims. The Rocky is a 10-ply 33x10.5R16 for 16-inch rims with a 1,760 lb rating.
Why MRT Tires
MRT (Moto Race Tire) builds its UTV range around anti-puncture sidewall construction. Its race, desert and rock lines use Kevlar- or aramid-belted sidewalls, and several models are offered in a sticky compound for riders who need more grip. Dunes 2 Dezert SXS carries the MRT line alongside the wheels, lug hardware and repair gear you need to finish the job.
Complete Your UTV Rock Crawling Setup
Choose your size and compound, confirm your 15-inch rims and clearance, and order the quantity you need. Pair them with a plug kit for the trail.
