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Dunlop Sportmax Roadsmart IV Rear Tire – 190/55ZR17
Product Overview
This is the 190/55ZR17 rear in the Dunlop Sportmax Roadsmart IV line, Dunlop part number 45253306. Dunlop builds the Roadsmart IV as a sport-touring tire: the priority is mileage and stability for road riding, with sport-level grip kept on the shoulders for cornering.
190/55-17 is the stock rear size on most current literbikes.
If your riding is mostly track days, this is not the tire built for that. The Roadsmart IV is aimed at riders who put real miles on the road and want the tire to last.
Key Technology & Design
Multi-Tread (MT) dual compound
The tread carries two compounds: a longer-wearing compound down the centre, where the tire runs when upright, and a grippier compound on the shoulders, where it runs when leaned over.
Hi Silica X and Fine Carbon compounds
Dunlop states that both the front and rear compounds use Hi Silica X and Fine Carbon to improve wet grip and braking performance.
Jointless Belt (JLB) rear construction
Dunlop builds the rear with a Jointless Belt, which they say limits the tire's growth at speed and sharpens handling response.
Mileage versus the Roadsmart III
Dunlop states that in their own testing the Roadsmart IV rear gave 26% more mileage than the Roadsmart III rear, and the front 23% more.
Lighter steering
Dunlop states the revised profiles need roughly 15% less steering input on turn-in than before, with more predictable feedback through the lean.
Specs
Dunlop part number
45253306
Size
190/55ZR17
Position
Rear
Load / speed index
(75W)
Construction
Radial
Type
Tubeless
Sidewall
Blackwall
Rim diameter
17"
Approved rim widths
5.50"–6.00"
Overall diameter
25.47"
Overall width
7.68"
Full tread depth
9/32"
Maximum load
853 lb @ 42 psi
Range
Dunlop Sportmax Roadsmart IV
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Dunlop Sportmax Roadsmart IV Rear Tire – 190/55ZR17

Tires / DUNLOP

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$411.95

HOU: 2 DAL: 0 WEB: 20

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Brand:

DUNLOP

SKU:

0302-1537

Description:

Dunlop Sportmax Roadsmart IV Rear Tire – 190/55ZR17

Product Overview

This is the 190/55ZR17 rear in the Dunlop Sportmax Roadsmart IV line, Dunlop part number 45253306. Dunlop builds the Roadsmart IV as a sport-touring tire: the priority is mileage and stability for road riding, with sport-level grip kept on the shoulders for cornering.

190/55-17 is the stock rear size on most current literbikes.

If your riding is mostly track days, this is not the tire built for that. The Roadsmart IV is aimed at riders who put real miles on the road and want the tire to last.

Key Technology & Design

Multi-Tread (MT) dual compound

• The tread carries two compounds: a longer-wearing compound down the centre, where the tire runs when upright, and a grippier compound on the shoulders, where it runs when leaned over.

Hi Silica X and Fine Carbon compounds

• Dunlop states that both the front and rear compounds use Hi Silica X and Fine Carbon to improve wet grip and braking performance.

Jointless Belt (JLB) rear construction

• Dunlop builds the rear with a Jointless Belt, which they say limits the tire’s growth at speed and sharpens handling response.

Mileage versus the Roadsmart III

• Dunlop states that in their own testing the Roadsmart IV rear gave 26% more mileage than the Roadsmart III rear, and the front 23% more.

Lighter steering

• Dunlop states the revised profiles need roughly 15% less steering input on turn-in than before, with more predictable feedback through the lean.

Specs

Dunlop part number	45253306
Size	190/55ZR17
Position	Rear
Load / speed index	(75W)
Construction	Radial
Type	Tubeless
Sidewall	Blackwall
Rim diameter	17″
Approved rim widths	5.50″–6.00″
Overall diameter	25.47″
Overall width	7.68″
Full tread depth	9/32″
Maximum load	853 lb @ 42 psi
Range	Dunlop Sportmax Roadsmart IV

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