Ridea SPM2 is a family of spider-based power meters available for road, track/single speed and mountain bikes. A spider-based power meter combines the ability to provide the most precise measurements in both legs with the smallest weight penalty (65 g more on average than a regular spider).

Ridea SPM2 integrates four measuring gauges to deliver accurate data (±1.5%) for both legs during up to 120 hours with an integrated battery rechargeable via USB. Everything protected under an IPX6 certification.

Connect via ANT+™ or Bluetooth® LE to your cycling computer or smartphone app and just ride! The automatic zero offset function will provide precise measurements of all your trainings and races.

GR4C version is a super-compact crankset for 46/30 chainrings. It is ideal for climbing and gravel bikes.

 

P/NPneuma Taroko SPM2 GR4C
Crank materialCNC AL7150
Crank arm length24: 140; 145; 150; 155; 160; 165; 167.5; 170; 172.5; 175; 180 mm
29: 155; 160; 165; 167.5; 170; 172.5; 175 mm
Spider mount positionsThree, in 10° steps
BCD110/96 mm
4 arms
Weight523 g (170 mm; TI64-24 mm spindle; w/o chainring)
Ridea chainringsLamiFlow GR4C series (1x or 2x)
ColorsBlack (more colors are available as a customization option)


 

Spindle diameterSpindle materialSpindle lengthBearing contact areaChain lineQ factor
24 mmSCM440 or TI64126 mm92 mm44.5 mm148 mm
29 mmAL7075126 mm92 mm44.5 mm148 mm

 

SPM2 Power Meter Spider Unit
Leg measurementBoth legs
Gauges4
Accuracy±1.5 %
Power range0 – 2000 W
Cadence range30 – 200 rpm
CalibrationAuto Zero Offset
Weather sealingIPX6
Battery120 hours
Temperature range-20 – 50 °C
ConnectivityANT+™ and Bluetooth® LE

 

Faults, battery wear and tear can be traded in at a discounted price*
Free within one year warranty
30% off after one year of warranty
 

Modular system

Pneuma cranksets are fully modular. The different parts (crank arms, spindles, power meter spiders, spiders and chainrings) can be mixed and matched to suit every rider specific needs. Your crankset can change with you at the same time that you change your riding style or your fitness.

The only limitations are that 29 mm spindles require specific Pneuma crank arms for 29 mm, and vice versa with 24 mm. Also, the BCD and number of bolts for both the spider and the chainrings must be the same. Other than that, you can mix and match Pneuma crankset parts to best suit your needs.

A new concept of hollow crank

All high-end cranks try to reduce weight by reducing the quantity of material used. Most cranks, despite the external appearance, are more or less hollow in the inside. Although in most cases, hollow cranks work flawlessly during the whole expected life of the crankset, sometimes moist and humidity can build up in the interior, leading to corrosion or rust and, eventually, crank failure.

The design of the Pneuma crank reduces the weight while retaining an optimal weight/stiffness ratio, as well as completely eliminates the possibility of corrosion or rust building up in hidden areas.

3 spider-chainring positions for your Powering

Pneuma spiders can be installed in three different angles, with ten degrees of separation between each position. When using oval chainrings like the Ridea Powering, this feature can be used to adjust the position of the biggest and lowest ratio of the chainring in relation to the crank arms, in order to better adapt to you riding preferences and musculature.

24 mm and 29 mm spindles

Ridea designed the first 29 mm diameter spindle back in 2012 with the ES BB29 series. Pneuma cranksets inherit this innovation and are available in 29 mm versions, which are compatible with other 29 mm solutions in the market like SRAM’s DUB™. Needless to say, Pneuma cranks are also available with 24 mm spindles, which again are compatible with other solutions like Shimano’s HOLLOWTECH II.

Available spindles for Pneuma cranks
 

The following table shows all the available spindles for Pneuma. Highlighted in gray are the spindle type(s) that is(are) standard for this specific crankset model (Pneuma Taroko SPM2 GR4C). Other spindles can be installed to suit specific needs.

 

Spindle modelBearing race diameterBearing race distance (outer-to-outer)Bearing race distance (inner-to-inner)Total lengthMaterialWeightApplication
R41024 mm92 mm70 mm126 mmSCM440 or TI64111 g (steel)
62 g (Ti)
Road, single speed and track bikes
M41124 mm96 mm74 mm130 mmSCM440 or TI64118 g (steel)
68 g (Ti)
MTB 135-142 mm
Brompton
Birdy (1x)
M41224 mm102 mm74 mm136 mmSCM440 or TI64124 g (steel)
69 g (Ti)
MTB 148 mm
Birdy (2x)
M41324 mm105 mm74 mm139 mmSCM440126 gMTB 157 mm
R91029 mm92 mm70 mm126 mmAL707587 gRoad, single speed and track bikes
M91129 mm96 mm74 mm130 mmAL707592 gMTB 135-142 mm
M91229 mm102 mm74 mm136 mmAL707596 gMTB 148 mm
M91329 mm105 mm74 mm139 mmAL707598 gMTB 157 mm
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