2025 LTWOO eR9 TT + ZRACE RX Groupset

The 2025 LTWOO eR9 TT + ZRACE RX Groupset delivers a fully electronic 1x/2x drivetrain designed for maximum aerodynamic efficiency in time trial and triathlon builds. Featuring wireless blip shifters, a robust 12-speed-compatible rear derailleur, Shimano-compatible hydraulic disc brakes, and a heat-efficient ZRACE RX crankset and rotor system, this groupset prioritizes speed, precision, and integration.

Key Features:

• Wireless blip shifting for TT/Tri setups (10–12-speed)
• Medium cage rear derailleur supports up to 11–32T
• Hydraulic disc brakes with internal Serial Channel bleed routing
• ZRACE RX crankset (DUB compatible) + vented 160mm rotors
• Wide cassette options in HG or XDR formats
• 12-speed ZRACE chain included (silver, low-friction)

Shifters & Brake Levers

Model: BL-R8001 + SW-R8001-L

• Type: Wireless blip lever system for aero bars
• Material: Aluminum (BL), Composite (SW)
• Braking Mode: Hydraulic disc
• Speed Compatibility: 10–12-speed
• Weight: 296g total (148g L/R levers + 40g SWs)
• Notes: Minimal cockpit interference; L-TWOO system compatible

Electronic Controller

Model: SW-R8001-L

• Control Method: Wireless
• Compatibility: eR9-specific for TT setups
• Speed Compatibility: 10–12-speed
• Material: Composite
• Weight: 40g
• Notes: Integrates seamlessly with blip levers and derailleurs

Front Derailleur

Model: FD-R8301

• Speed: 2-speed
• Max Chainring: 54T
• Capacity: 16T
• Chainline: 43.5–44.5mm
• Shifting: Wired electronic
• Material: Aluminum
• Weight: 138g
• Notes: Optimized for large aero chainrings

Rear Derailleur

Model: RD-R8301

• Speed Compatibility: 10–12-speed
• Max Cassette: 11–32T
• Cage Length: Medium (93mm)
• Material: Aluminum (main + cage)
• Weight: 292g
• Notes: Reliable performance across full gear range

Braking System (Included)

Model: BR-R6120-F (Pair)

• Type: Hydraulic disc
• Rotor Compatibility: 140mm / 160mm
• Caliper Weight: 220g (pair)
• Pad Type: Egg roll cooling pads (Shimano-compatible)
• Cooling: Integrated fin system
• Maintenance: Internal Serial Channel bleed for clean routing

ZRACE RX Road Crankset

• Material: 6061 Aluminum Arms + 7075 Chainrings
• Q-Factor: 148mm
• BCD: 110mm
• BB Compatibility: DUB
• Weight: 525g
• Features: 3-hole hollowtech arms, CNC machining

ZRACE RT-RX Disc Brake Rotors

• Material: Stainless Steel Disc + Aluminum Carrier
• Size: 160mm
• Weight: 111g (Center Lock) / 126g (6-Bolt)
• Features: Vented design for cooling under high loads

ZRACE Chain (Included Free)

• Speed: 12-speed
• Weight: 271g (126L)
• Color: Silver
• Features: Low-friction coating for smooth shifting

Cassette Options

ALPHA HG (12-Speed – HG Freehub)

• Material: Molybdenum Steel + 7075 Aluminum
• Weights:
  • 11-28T: 133g
  • 11-30T: 142g
  • 11-32T: 144g

STD HG (12-Speed – HG Freehub)

• Material: AL7075 CNC-Machined
• Weights:
  • 11-30T: 312g
  • 11-32T: 341g

ALPHA XDR (12-Speed – XDR Freehub)

• Material: Cr-Mo Steel + 7075 Aluminum
• Range: 10-28T
• Weight: 208g
• Tooth Layout: 10-11-12-13-14-15-16-17-19-22-24-28T

Bottom Bracket Compatibility

For DUB-compatible crankset, choose one:

• BB30-ROAD
• PF30-ROAD
• BB86
• BB92
• BB386
• BSA-ROAD

Why Choose This Groupset?

The 2025 LTWOO eR9 TT + ZRACE RX Groupset is a fully integrated electronic drivetrain tailored for time trialists and triathletes. With refined wireless control, smooth and fast shifting across wide-range cassettes, and elite-grade braking and crankset systems, it’s engineered to cut seconds on the clock without sacrificing reliability or ease of maintenance.

What’s Included in the Box?

• LTWOO eR9 TT Wireless Blip Levers (BL-R8001)
• LTWOO eR9 Wireless Control Units (SW-R8001-L)
• Front Derailleur (FD-R8301, 2-speed)
• Rear Derailleur (RD-R8301, Medium Cage)
• Hydraulic Disc Brake Calipers (BR-R6120-F, Pair)
• ZRACE RX Crankset (DUB Compatible)
• ZRACE RT-RX Rotors (160mm, Center Lock or 6-Bolt)
• Free ZRACE 12-Speed Chain (Silver)
• Cassette (User Choice: ALPHA HG / STD HG / ALPHA XDR)
• Bottom Bracket (User Choice: Road-specific type)

Ready to dominate your next race? Upgrade to the 2025 LTWOO eR9 TT + ZRACE RX groupset for unmatched aero integration, precision shifting, and triathlon-tuned power.