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DUKE RIM LUCKY JACK ULTRA SLS4

Name: DUKE RIM LUCKY JACK ULTRA SLS4
Brand: DUKE RACING WHEELS
SKU: JANTE DUKE LJU SLS4
Price: 523 EUR
Availability: InStock

the Lucky Jack Ultra is the rim of the weight-weenies! This is the ultimate weapon to lighten your mountain bike, recommended for XC light and non-committal use, it will be able to cope with most situations.

Variantes disponibles

RIM DIAMETER

INNER WIDTH

HOLES NUMBER

255 g

€523.00 Tax included

8 In stock

Expected shipping date: 23/06/2025

Quantity

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It has an unbeatable lateral stiffness / weight ratio and an unmatched level of responsiveness. It is aimed at athletes looking for lightness. Its profile is asymmetrical (offset of 2 mm), which increases the lateral rigidity of the wheel without gaining weight. The interior width between walls is 24.5, 28 or 30mm. The walls are hookless (hookless design): the strength of the rim is greater compared to that of a carbon rim with hooks. This technology has been used successfully on our rims since 2011! With SLS4 technology, the robustness is further improved and the weight saving is close to 10%. Anti-burp system: the tire bead is kept in position whatever its pressure, no risk of air loss in the corners. Technologies: Anti-burp; Asymmetric; Hookless; SLS4; Oriented spoke holes; TLR; Lucky; Jack; Duke French brand

Technology

SLS4 (Super light series 4)

SLS4 (Super Light Series 4)

An exclusive manufacturing process combining an optimized carbon fiber lay-up with aerospace-grade resin
- 10% lighter than the previous SLS3 generation
- More controlled vertical compliance for enhanced ride dynamics
- Better vibration filtering for improved comfort and control
DRC (Dynamic Response Comfort)

DRC (Dynamic Response Comfort)

Controlled vertical flex and rebound
- More dynamic handling during weight transfers and bermed corners
- Increased comfort on rough terrain
- Reduced energy loss, more speed and efficiency
Width

Optimized Internal Width

Maximizes tire volume and performance
- Enables lower pressures without sacrificing rolling efficiency
- Controls tire deformation for greater stability
- Improves control and comfort on all terrains
VFP (Varnish Free Process)

VFP (Varnish Free Process)

A varnish-free finish process
- Reduces VOC emissions and carbon dust during production
- More scratch-resistant surface
- Naturally glossy finish
Offset

OFFSET

Asymmetrical spoke lacing
- Balances spoke tension on both sides
- Improves lateral stiffness, stability, and long-term durability
- No added weight
6Ters

6TERS

Differentiated internal rim widths for the front and rear wheels
- Wider front rim increases grip, handling, and control
- Narrower rear rim for better strength, stability, and efficiency
- Developed in partnership with leading XC race teams
Hookless

HOOKLESS

Hookless rim design
- Lighter than traditional hooked rims
- Increases the tire’s internal air volume, boosting comfort and grip at lower pressures
- Proven DUKE technology since 2011
AntiBurp

AntiBurp

Anti-burp and anti-debeading system
- Specially designed inner rim hooks lock the tire beads securely
- Eliminates air loss under heavy cornering or compression
- Prevents tire debeading, even in the event of a puncture
Anti-pinch

AntiPinch

Anti-pinch rim bead design
- Prevents tire cuts from hard impacts
- Dissipates shock energy
- Allows low-pressure riding without pinch-flat risks
Tubeless Ready

Tubeless Ready

Tubeless-compatible rim design
- Compatible with UST and Tubeless Ready standards
- Also compatible with tube-type (clincher) setups

Data sheet

RIM MATERIAL: CARBON
RIM PROFILE: ASYMMETRIC
RIM HEIGHT (MM): 18
19
20
SYSTEM MAX WEIGHT (KG): 95
95.0
INSIDE WIDTH (MM): 24.5
28.0
30.5
TYPE OF BRAKING: DISC
MAX STRAIN (N): 1200.0
PRACTICE TYPE: GRAVEL BIKE
XC
NIPPLE POSITION: EXTERNAL
NIPPLE HEIGHT (MM): 14.0
16.0
TYPE OF TYRE: CLINCHER
TUBELESS
TUBELESS OU CHAMBRE À AIR
VALVE HEIGHT (MM): 34
TAPE WIDTH (MM): 26.0
30.0
32.0
MAX PRESSURE (BAR): 2.3B WITH 2.25" TYRE
ERD JANTE(S): LJU 25 : 602
LJU 28 : 599
LJU 30 : 599
ETRTO (MM): 622.0
RIM OFFSET (MM): 2.4
2.8
MOUNTING WITH WASHERS: NO
POSITION: FRONT
REAR
TYRE SECTION RANGE: 32MM 1,25" / 61MM 2,40"
48MM 1,90" / 66MM 2,60"
53MM 2,10" / 71MM 2,80"
STICKER TYPE: L48
L52
L54
RIM BRAND: JANTE DUKE
WARRANTY: 3 YEARS
FINITION JANTE: UD PAINTLESS

Crash replacement

We offer a crash replacement programme for carbon wheels. In case of accidents or heavy falls, violent shocks can damage your rim and make it impossible to use. With our Crash Replacement offer we offer you a service that allows you to replace your rim under special conditions: You get a 50 percent discount on the price of the rim (UD SLS carbon) 40 percent (3k Carbon), as well as the parts and the disassembly/reassembly. This offer is valid (for life) for an unlimited period of time for DUKE carbon rims and is transferable in the event of sale of the wheels to a third party.

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