アメリカ最大のコンポーネントメーカーSram(スラム)
シマノのホローテックに対抗してSramが世に送り込んだGXPと呼ばれる
中空システムのトラック用クランクセット
OmniumのPCD130仕様
デフォルトのチェーンリングは薄刃が付いていますが、もちろん厚歯用に交換して使用する事も可能です。
中空、大口径シャフトにすることで、軽量化しつつも剛性アップに成功、更にスピンドルとクランクが一体型となっているので踏み込みの際に身体で感じる独特のダイレクト感は格段にアップ
The SRAM S300 puts the precision of PowerGlide shifting technology within easy reach. PowerGlide also gives you enhanced tooth profiles for quicker shifting and more precision. The crank arms are forged out of our AL-6061-T6 alloy material with a design that is beautiful, strong, and light. The addition of the Giga X Pipe™ offers a legendary and durable bearing design in a lightweight package. The SRAM S300 is available in both full-size and compact ratios and in multiple crank arm lengths.
GXP - Giga X Pipe External Bottom Bracket Bearing Assembly. While other systems rely on side loading the bearings to eliminate play, which causes premature bearing wear, the GXP system is different. The GXP system captures the left side bearing between the spindle and the left crankarm while allowing the drive-side bearing to float axially on the spindle, thereby eliminating the necessity to side-load bearings during adjustment. The simplicity of installation is refined: once it is tightened to the proper specifications you are ready to roll with a worry free BB. The GXP system uses two bicycle specific cartridge bearings and eight seals for a smooth and long lasting ride.
ARM MATERIAL : AL-6061 T6 Alloy
P.C.D. : 130mm
WEIGHT : 900 Grams with GXP BB