Pneuma Taroko GR4C 曲柄組
【台灣品牌RIDEA】Pneuma Taroko GR4C曲柄組！！
Pneuma Taroko GR4C is the super-compact option in the Taroko cranks line. The 46-30t ratio makes keeping your cadence in hard climbs and gravel routes easier than ever.
|P/N||Pneuma Taroko GR4C|
|Crank material||CNC AL7150|
|Crank arm length||24: 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 positions||Three, in 10° steps|
|Weight||460 g (170 mm; TI64-24 mm spindle; w/o chainring)|
|Ridea chainrings||LamiFlow GR4C series (1x or 2x)|
|Colors||Black (more colors are available as a customization option)|
|Spindle diameter||Spindle material||Spindle length||Bearing contact area||Chain line||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|
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 GR4C). Other spindles can be installed to suit specific needs.