PN R492 Crank Road Bike

Modular Design · Personalized Drivetrain Setup

140–180 mm Crank Lengths | 24 mm / 29 mm Spindle Options

Three-Position Spider Angle Adjustment | Supports 1x / 2x Chainring Configurations

Compatible with Shimano DURA-ACE 9200 Series Chainrings (110 mm BCD, 4-Bolt)

Modular design with hollow crank arms and adjustable spider positions for a lightweight, versatile drivetrain setup, ideal for road riding, training, and racing

( Note: Chainrings are sold separately. Please specify your preferred crank length, spindle option, and spider color in the order notes. )

DESCRIPTION
TECHNOLOGY

【PN R492 Pneuma Taroko Road Crank】

Featuring a 110 mm BCD and a four-arm design, the Pneuma Taroko R492 offers versatile configuration options within the Taroko crank series. It supports both 1x and 2x chainring setups. Compatible with a wide range of LamiFlow R492 chainring sizes, it is suitable for racing, daily training, and a variety of road-riding conditions.

Compatible chainrings can also be used with RIDEA R492 cranksets, SPM2-R4, and Shimano cranksets that use a 110 mm BCD and a four-bolt mounting pattern, providing greater flexibility when selecting chainrings.

In addition, the spider offers three mounting positions at 10° intervals. When paired with compatible oval chainrings, such as the RIDEA Powering series, the chainring's orientation relative to the crank arm can be adjusted to suit individual pedaling preferences.

P/N	Pneuma Taroko R492
Crank Material	CNC AL7150
Crank arm length	24 mm spindle: 140, 145, 150, 155, 160, 165, 167.5, 170, 172.5, 175, 180 mm 29 mm spindle: 155, 160, 165, 167.5, 170, 172.5, 175 mm
Spider Mounting Positions	3 positions, 10° apart
BCD	110 mm \| 4 arms
Weight	455 g (170 mm; TI64-24 mm spindle; w/o chainring)
Compatible Chainrings	LamiFlow R492 series (1x / 2x) - sold separately
Crank Arm Color	Black ( custom colors available )
Spider Colors	Black, Red, Gold, Silver ( custom colors available )

Spindle Diameter	Spindle Material	Spindle Length	Bearing Contact Width	Chainline	Q-Factor
24 mm	SCM440 or TI64	126 mm	92 mm	44.5 mm	148 mm
29 mm	AL7075	126 mm	92 mm	44.5 mm	148 mm

01 Modular System

Pneuma cranksets feature a fully modular design, allowing crank arms, spindles, power meter spiders, spiders, and chainrings to be combined according to component compatibility and individual riding needs.

Whether you want to adjust your riding setup or adapt to changes in your training, the modular system allows you to configure your crankset to suit your needs.

The Pneuma Taroko R492 features a 110 mm BCD and a four-arm design. It is compatible with the LamiFlow R492 series chainrings and supports both 1x and 2x configurations.

The 29 mm spindle version requires compatible Pneuma crank arms designed for the 29 mm spindle system. The BCD and bolt pattern of the spider and chainrings must also match. Please confirm component compatibility before selecting your configuration.

02 Hollow Crank Design

Many high-end crank arms reduce weight by using less material, and hollow structures are common in crank designs. However, moisture can accumulate inside hollow components, potentially increasing the risk of corrosion over time.

Pneuma crank arms feature a hollow structure designed to reduce weight while maintaining a balance of stiffness and structural strength. The design also helps reduce the potential for moisture and contaminants to accumulate inside, supporting long-term durability.

03 Three Spider Mounting Positions for Oval Chainrings

Pneuma spiders offer three mounting positions, with a 10° difference between each position. When used with compatible oval chainrings, such as the RIDEA Powering series, this feature allows the chainring's orientation relative to the crank arm to be adjusted.

Riders can choose a suitable chainring position according to their individual pedaling preferences and riding needs.

04 Dual Spindle Options

In 2012, RIDEA introduced its ES BB29 series, featuring a 29 mm spindle design. Pneuma continues this design concept with a 29 mm spindle option for compatible Pneuma crank arms and drivetrain systems, including suitable SRAM DUB™-compatible configurations.

A 24 mm spindle option is also available for compatible setups using Shimano HOLLOWTECH II systems. Compatibility depends on the specific crank arms, spindle, bottom bracket, and other components used.

Available Spindle Options

The following table lists the spindle specifications available for Pneuma cranksets. The highlighted specifications indicate the standard spindle configuration for the Pneuma Taroko R492. Other options may be available upon request, subject to component compatibility.

Spindle model	Bearing race diameter	Bearing race distance (outer-to-outer)	Bearing race distance (inner-to-inner)	Total length	Material	Weight	Application
R410	24 mm	92 mm	70 mm	126 mm	SCM440 or TI64	111 g (steel) 62 g (Ti)	Road, single speed and track bikes
M411	24 mm	96 mm	74 mm	130 mm	SCM440 or TI64	118 g (steel) 68 g (Ti)	MTB 135-142 mm Brompton Birdy (1x)
M412	24 mm	102 mm	74 mm	136 mm	SCM440 or TI64	124 g (steel) 69 g (Ti)	MTB 148 mm Birdy (2x)
M413	24 mm	105 mm	74 mm	139 mm	SCM440	126 g	MTB 157 mm
R910	29 mm	92 mm	70 mm	126 mm	AL7075	87 g	Road, single speed and track bikes
M911	29 mm	96 mm	74 mm	130 mm	AL7075	92 g	MTB 135-142 mm
M912	29 mm	102 mm	74 mm	136 mm	AL7075	96 g	MTB 148 mm
M913	29 mm	105 mm	74 mm	139 mm	AL7075	98 g	MTB 157 mm