SRAM Paceline X Centerlock Road Disc Brake Rotor

Name: SRAM Paceline X Centerlock Road Disc Brake Rotor
Brand: SRAM
Price: 79.0 USD
Availability: InStock
Rating: 5.0 (1 reviews)

$79.00 USD

Paceline X combines a quiet stainless-steel braking track with SRAM’s lightest aluminium carrier, delivering low weight, dependable stopping performance and a premium upgrade for Australian road, race and all-road bikes.

Key SRAM Paceline X Centerlock Features

Two-piece construction combines a durable steel braking track with a lightweight aluminium carrier.
Paceline brake-track design promotes smooth, quiet braking with reduced vibration.
Available in 140mm and 160mm diameters for performance road bike setups.
Centerlock mounting enables fast, secure installation on compatible road wheels.
Rounded outer edges assist wheel installation and provide a race-compliant finish.

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The SRAM Paceline X is a premium road bike disc brake rotor developed alongside the current SRAM RED AXS generation. It retains SRAM’s smooth Paceline braking surface while reducing weight through a minimalist aluminium carrier.

Product type: Road bike disc brake rotor
Manufacturer: SRAM
Product name: SRAM Paceline X Centerlock Disc Brake Rotor
Manufacturer model ID: RT-PLN-X-A1
Recommended use: Road cycling, racing, triathlon, cyclocross and compatible light all-road riding
Rotor construction: Two-piece
Brake-track material: Stainless steel
Carrier material: Aluminium
Mounting standard: Centerlock
Available diameters: 140mm and 160mm
Rotor colour: Black and silver
Brake-pad compatibility: Compatible with SRAM-approved organic and metallic disc brake pads
Lockring: Included with retail configurations, but lockring type varies by version
Bolt hardware: Not applicable to Centerlock mounting
Nominal new rotor thickness: Approximately 1.8 to 1.85mm
Minimum service thickness: Check the value marked on the individual rotor, with current rounded versions commonly marked at 1.7mm
Claimed pair weight: 280 grams for two 160mm rotors with SRAM lockrings
Approximate single 160mm rotor weight: 130 to 131 grams before accounting for variation in lockring type
Approximate single 140mm rotor weight: 100 to 108 grams without the lockring
Measured 140mm internal-spline lockring weight: Approximately 7 grams

Two-piece rotor construction

The SRAM Paceline X uses a stainless-steel braking track attached to a lightweight aluminium carrier. Stainless steel provides the wear resistance and friction surface required for hydraulic disc braking, while aluminium removes weight from the central section and adds structural support.

Compared with a basic one-piece steel rotor, this construction creates a more premium balance of braking consistency, stiffness and low weight. It is particularly appropriate for lightweight road bikes where riders want dependable stopping performance without adding unnecessary rotating mass.

Paceline brake track

The carefully shaped Paceline ventilation pattern is designed to provide smooth pad contact and quiet operation. The arrangement of the openings helps limit the pulsing, humming and high-frequency noise that can occur when brake pads pass over a more aggressive rotor pattern.

No road disc brake can be guaranteed silent in every situation. Contamination, glazing, poor caliper alignment and wet weather can still cause noise, but the Paceline track is designed to reduce vibration when the brake system is correctly installed and bedded in.

Lightweight aluminium carrier

The Paceline X uses SRAM’s lightest aluminium rotor carrier. Removing weight from the carrier reduces overall wheel-system mass while retaining the stable mounting platform expected from a premium two-piece road rotor.

The weight difference will be subtle during normal riding, but it complements a lightweight wheelset, SRAM RED AXS groupset or performance road bike build where multiple small component savings contribute to a lower complete-bike weight.

140mm version

The 140mm SRAM Paceline X is the lighter and more compact option. It is commonly selected for the rear wheel of a road race bike or for lighter riders using 140mm rotors at both ends.

Rotor diameter: 140mm
Rotor radius: 70mm
Approximate rotor weight: 100 to 108 grams without lockring
Approximate internal-spline lockring weight: 7 grams
Primary benefit: Lower weight
Typical use: Rear road brake or lightweight front and rear race setup
Heat capacity: Lower than the 160mm version
Braking leverage: Lower than the 160mm version

160mm version

The 160mm SRAM Paceline X provides greater braking leverage and more surface area for handling heat. It is generally the preferred front rotor size for Australian riders and is also a sensible rear option for heavier cyclists, loaded bikes and mountainous routes.

Rotor diameter: 160mm
Rotor radius: 80mm
Approximate rotor weight: 130 to 131 grams without lockring
Primary benefit: Greater braking power and thermal capacity
Typical use: Front road brake, front and rear endurance setup, or demanding descending
Heat capacity: Higher than the 140mm version
Braking leverage: Higher than the 140mm version

The 160mm size is particularly well suited to Australian conditions, where long descents, high summer temperatures and fast bunch rides can place considerable thermal load on road brakes, while the 140mm version works well for lighter riders and weight-conscious rear-wheel setups. Its stainless-steel braking surface is appropriate for coastal humidity, occasional rain and everyday road grime, provided it is kept clean and inspected regularly.

SRAM generally provides the original owner with a two-year limited warranty against qualifying defects in materials or workmanship. Proof of purchase is normally required, and claims should be made through the original retailer or an authorised SRAM service location.

Normal braking-surface wear, contamination, incorrect installation, crash damage, overheating caused by misuse and damage from incompatible components are generally excluded.

The most important context is that a rotor cannot create excellent braking in isolation. Lever geometry, caliper stiffness, pad compound, rotor size, bedding procedure and system alignment all influence the final result. The Paceline X is therefore best understood as a lightweight and well-refined part of SRAM’s complete road hydraulic braking system.

Independent measured data has placed the 160mm rotor at approximately 130 to 131 grams, aligning closely with SRAM’s 280-gram claimed weight for two 160mm rotors and their lockrings. A 140mm example has been measured at approximately 108 grams, plus around 7 grams for an internal-spline lockring

SRAM Centerline XR Centerlock Rotor

The SRAM Centerline XR is another premium two-piece rotor commonly fitted to SRAM road groupsets.

SRAM Centerline XR advantages:

Proven braking track
Premium appearance
Broad recognition among existing SRAM AXS owners
Competitive rotor weight

SRAM Paceline X advantages:

Newer road-focused styling
Rounded outer edge
SRAM’s lightest aluminium Paceline carrier
Designed to complement the current RED AXS E1 braking system
Often available at a more attractive price than Centerline XR

The braking difference between two clean, correctly aligned rotors may be small. Riders are more likely to notice differences in appearance, weight, noise and resistance to distortion.

SRAM Paceline Centerlock Rotor

The standard SRAM Paceline is the value-oriented alternative for road and gravel cyclists.

SRAM Paceline advantages:

Lower purchase price
Quiet road-specific braking track
Suitable for everyday training and replacement use
Good value for commuter and endurance bikes

SRAM Paceline X advantages:

Lighter two-piece construction
Aluminium carrier
More premium finish
Better suited to lightweight race builds

The standard Paceline is the stronger value choice when cost matters more than component weight. Paceline X is the better match for a premium wheelset or RED AXS build.

Shimano Dura-Ace RT-CL900 Rotor

The Shimano RT-CL900 is a premium Centerlock road rotor designed around Shimano’s Ice Technologies Freeza heat-management system.

Shimano RT-CL900 advantages: