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KENDATouring

Loadstar K399 Trailer

Purpose-built trailer tire engineered for stability, heat control, and load-rated durability — the reliable workhorse behind every serious hauling setup.

MTC7.8/10★★★★☆Trailer · Load-Rated Hauler
KENDA Loadstar K399 Trailer motorcycle tiremotorcycletireco.com
BrandKENDA
TypeTouring
Sizes4
Computer-optimized tread geometry delivers radial-style looks with the stiff, puncture-resistant benefits of bias-ply construction
Advanced compound balances long tread life with low rolling resistance — less heat, better fuel economy on extended hauls
Flatter contact patch under load improves straight-line stability when towing at highway speeds
Stiff bias sidewalls resist flex and road damage during low-speed paddock maneuvering and rough surface crossings
Available in 4PR and 6PR configurations to match your trailer's actual GVWR — right-spec the tire, don't guess
Heat-dissipating tread design reduces core temperature buildup on long interstate stretches where trailer tires commonly fail
Select Size

Prices use MTC dealer formula · Load/speed index explained in the FAQ below

Fulfillment

Live pricing · Walk-in mount & balance available

🛞 Running a spoked wheel? Shop 10″ inner tubes →
Save below MSRPIn-stock · ships fastWalk-in install
MTC Rating
MTC Score
7.8/10
★★★★☆
The K399 is the dependable trailer tire for riders who tow regularly and need predictable stability, genuine durability, and correct load capacity — not flash.
Performance
Dry Grip7.0
Wet Grip6.5
Street Manners8.0
Track Capability0.0
Mileage8.5
Value8.5
Best For
The Track Day Hauler
You're pulling an open or enclosed trailer to the circuit 8 to 12 weekends a year and reliability is non-negotiable. The K399's stiff sidewalls handle paddock curb strikes and gravel lots without drama, and consistent wear means you're not babysitting tread depth mid-season.
Perfect Match
The Cross-Country Tourer
You log serious highway miles with a loaded trailer across varied conditions. The K399's low rolling resistance keeps fuel costs in check and its heat-dissipating tread handles long interstate stretches without the thermal buildup that kills lesser trailer tires.
Great Match
The Heavy-Load Commercial User
If you're running a commercial hauling setup or consistently towing at or near maximum capacity, the K399's 6PR rating handles a solid range — but extreme-duty cycles with elevated tongue weights may call for a dedicated heavy-duty commercial trailer tire with reinforced sidewall construction.
Consider heavy-duty commercial alternatives
Full Size Chart & Part Numbers
Pos.SizeLoad/SpeedP/NMFR Part #UPC-AOur Price / MSRP
205/65-1020510B1093991026B1$64.15$75.95Save $12
205/65-1020510C1093991026C1$69.73$82.95Save $13
215/60-81858C1093990823C1$64.88$76.95Save $12
215/60-8K36811093990823B1$59.58$70.95Save $11
Frequently Asked
Ply rating is shorthand for load capacity. The 4PR suits lighter trailers with modest tongue weight, while the 6PR handles heavier setups with more cargo. Start with your trailer's GVWR placard — that number tells you which rating you actually need. Over-speccing is wasted money; under-speccing is a blowout waiting to happen.
Hard no. Mixing load ratings on the same axle creates uneven load distribution and introduces unpredictable handling under stress. Both tires on an axle must match in size, load rating, and inflation pressure. The risk of premature failure and blowout is real — don't cut corners here.
Bias tires like the K399 deliver stiffer sidewalls that hold up better under load flex and resist punctures from road debris — both common trailer-use scenarios. Radials ride smoother and roll with less resistance, but they're more susceptible to sidewall damage and cost more. For motorcycle trailer duty, bias construction is usually the smarter, more pragmatic call.
Run the pressure stamped on the tire sidewall — trailer tires typically require maximum rated pressure regardless of how light your load is, which is the opposite of how you'd think about car tires. Low pressure is the leading cause of heat buildup and sudden failure on trailer tires. Check cold pressure before every trip, no exceptions.
Tread depth isn't the only clock running on trailer tires — UV exposure and ozone degrade rubber even when the tire looks fine. Plan to replace after 5 to 7 years regardless of remaining tread. Under proper inflation and occasional rotation, expect 8,000 to 12,000 miles of real-world service life in typical hauling use.
It's not mandatory under 55 mph, but if you're regularly pulling at highway speeds of 65 mph or more, balancing is worth doing. You won't feel the vibration the way you would in a vehicle, but unbalanced trailer tires quietly accelerate bearing and hub wear over time. At MTC we can handle balancing when you bring your trailer wheels in — call (714) 516-9059 to set it up.

Kenda Loadstar K399 Trailer Tires in Orange County — MTC

Motorcycle Tire Center in Orange, CA stocks the Kenda Loadstar K399 for riders throughout Orange County — from Irvine and Anaheim to Mission Viejo, Newport Beach, Fullerton, and Huntington Beach — who need a dependable, properly load-rated trailer tire backing up their riding setup. The K399's bias-ply construction, heat-dissipating tread, and available 4PR and 6PR configurations make it a straightforward answer to the question every serious tourer and track-day hauler eventually asks: what's actually on my trailer?

At MTC we price the K399 below MSRP and offer walk-in mounting and balancing service — $69 mount, $9.95 balance, and $3.50 disposal per tire. Bring your trailer wheels in and we'll get them done right, including verifying you're in the correct load rating for your trailer's GVWR. No appointment needed, and our staff knows trailer tire spec as well as they know sport and touring rubber — because getting your bike to the destination safely matters as much as the ride itself.

Questions about which ply rating fits your setup, or whether the K399 is the right call for your tow weight? Call us at (714) 516-9059. We're the motorcycle tire experts in Orange County, and that extends to everything rolling behind your bike, not just what's under it.

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