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2008 Honda TRX450R: Tire Pressure, Safety and Parts Guide

Honda’s 2008 TRX450R manual specifies 4.7 psi front and 4.0 psi rear when cold. Learn the model’s use and safety guidance, maintenance caveats and parts-fitment checks.
Entry459 Date Time2 min MechanicCarCody Team
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The 2008 Honda TRX450R is an off-road sport ATV for one rider. Honda’s model-year owner’s manual specifies cold tire pressures of 4.7 psi at the front and 4.0 psi at the rear, and it cautions against inflating the tires with a high-pressure service-station system. Use the manual for the vehicle’s original specifications, and confirm the exact model designation and part number before ordering parts.

What the 2008 Honda TRX450R is designed for

Honda states in the 2008 TRX450R/TRX450ER owner’s manual that “Your ATV is designed and manufactured for off-road use only.” Its tires and equipment are not intended for public-road use. Local laws and requirements may also apply.

The manual describes it as a one-person vehicle: “Your ATV is designed for one person only.” Honda recommends a minimum rider age of 16. It also advises wearing an approved motorcycle helmet, eye protection, sturdy boots, gloves and other protective gear. These are the manufacturer’s instructions for this model year, not a replacement for local rules or an assessment of a particular ATV’s condition.

Recommended tire pressure

Position Honda recommended cold pressure
Front 4.7 psi (32.5 kPa)
Rear 4.0 psi (27.5 kPa)

These specifications are from American Honda Motor Co., Inc.’s 2008 owner’s manual. Check pressure when the tires are cold. Because the values are only about 4–5 psi, use a gauge intended to read accurately in that low range; do not assume a general automotive gauge is accurate at these pressures.

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#1 Best Overall
24x8-12 24x9-11 ATV Tires for 00-06 Honda Fourtrax Rancher TRX350FM 350 4X4
  • Full set (2 front+2 rear) complete replacement for 00-06 Honda Fourtrax Rancher TRX350FM 350 4X4
  • Top notch handling & superior traction offer a significantly smoother ride in dirt, mud or rock, woods and desert
  • Additional shoulder lugs protect rim and sidewall
  • Non-directional tread pattern, Riding cleat for smoother trail riding
  • 36% deeper tread than major competitor with similar tread patterns, result as heavier, longer lifetime, and more

Honda cautions against using a high-pressure service-station system to inflate the tires and recommends a manually operated pump. The manual also discusses tire size and type, handling and stability, and replacing tires in matching pairs if all four cannot be replaced. Check the manual for the specified sizes and types; do not assume a currently sold tire is a direct replacement without confirming fitment.

Maintenance depends on riding conditions

Honda’s maintenance schedule is based on average riding conditions. It calls for more frequent service when the ATV is used severely or ridden in unusually wet or dusty areas. The schedule guidance also flags sand, snow, very wet or muddy conditions, and full-throttle riding. Match the service interval to the way the ATV is actually used rather than treating the average-condition schedule as universal.

Rank #2
WANDA Sport ATV Tires 21x7-10 & 20x10-9 for for HONDA TRX 250 300 400 450
  • Can be used in any type of cross country terrain
  • Dynamic tread pattern provides exceptional traction
  • Full set (2 front and 2 rear) for complete replacement
  • Heavy 4 ply rated nylon construction resists punctures and abrasions
  • Tires only, rims are not included

The manual covers some basic tasks for owners with mechanical skills, while more difficult work may require special tools or professional service. It identifies an official Honda Service Manual as a source of further procedures and recommends a dealer for work that calls for advanced skills, tools or service data. A model-year manual does not establish the present condition or service needs of an individual ATV.

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Finding parts and diagrams

Huntington Beach Honda’s 2008 TRX450R A tools diagram provides a model-specific parts-search path. Its listing includes items such as a tire-pressure gauge, screwdrivers, wrenches, owner’s manual storage parts and the tool box; the broader catalog includes engine, chassis, brake, wheel, fuel and suspension assemblies.

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Rank #3
WANDA 4 ATV tires 22x7-10 20x10-9 for Honda TRX 250R 300EX 400EX 400X 450R
  • Specially manufactured for Grand National Cross Country (GNCC) racing, most others in the market are not!
  • Can also be used in any type of cross country terrain on a non-race basis
  • Dynamic tread pattern provides exceptional traction
  • Enhanced lug depth brings better brake control
  • Heavy 4 ply rated nylon construction resists punctures and abrasions

A catalog diagram does not guarantee that an item is in stock, that its part number is current, or that it fits every regional or model variant. Before buying, confirm the ATV’s exact designation and the part number against the diagram or with a Honda parts department. Do not infer interchangeability from a similar-looking part or a listing for a different variant.

Quick Recap

Bestseller No. 1
24x8-12 24x9-11 ATV Tires for 00-06 Honda Fourtrax Rancher TRX350FM 350 4X4
24x8-12 24x9-11 ATV Tires for 00-06 Honda Fourtrax Rancher TRX350FM 350 4X4
Additional shoulder lugs protect rim and sidewall; Non-directional tread pattern, Riding cleat for smoother trail riding
$295.61
Bestseller No. 2
WANDA Sport ATV Tires 21x7-10 & 20x10-9 for for HONDA TRX 250 300 400 450
WANDA Sport ATV Tires 21x7-10 & 20x10-9 for for HONDA TRX 250 300 400 450
Can be used in any type of cross country terrain; Dynamic tread pattern provides exceptional traction
$196.60
Bestseller No. 3
WANDA 4 ATV tires 22x7-10 20x10-9 for Honda TRX 250R 300EX 400EX 400X 450R
WANDA 4 ATV tires 22x7-10 20x10-9 for Honda TRX 250R 300EX 400EX 400X 450R
Can also be used in any type of cross country terrain on a non-race basis; Dynamic tread pattern provides exceptional traction
$223.09
Bestseller No. 5
WANDA Set4 ATV Tires 27x9R14 27x11R14 for 16-17 Honda Pioneer 1000 LE/Delux
WANDA Set4 ATV Tires 27x9R14 27x11R14 for 16-17 Honda Pioneer 1000 LE/Delux
Patented unique non directional interlock tread pattern design; Full lugs warp around all tire sidewall to give full protection to tire sidewall and rim
$532.46
Best Value
WANDA Set4 ATV Tires 27x9R14 27x11R14 for 16-17 Honda Pioneer 1000 LE/Delux
  • Full set (2 front + 2 rear) tires for complete replacement of 16-17 Honda Pioneer 1000 LE/Delux
  • Patented unique non directional interlock tread pattern design
  • Full lugs warp around all tire sidewall to give full protection to tire sidewall and rim
  • Give extra traction and excellent bit while corning
  • Heavy 8 ply rated construction resists punctures and abrasions, longer life

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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