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PF30 - All the Best From BB30 and Press-Fit

PF30 is all the best from BB30 and Press-Fit bottom brackets in one captivating package. This bottom bracket is designed for 30mm spindle cranksets. The key difference with PressFit 30 is how the bearings are fitted into the frame. Bearings are housed in nylon cups which will be pressed into the frames bottom bracket shell. Advantages: Huge weight savings, greater bearing durability, more ankle clearance, stiffer and stronger crank construction, simple installation.

Introduction of the Standard

PressFit 30 will feature an integrated seal, pre-assembled into the cups, to further prolong bearing life. Bearings are housed in nylon cups which will be pressed into the frames bottom bracket shell. This bottom bracket is designed for 30mm spindle cranksets. The spare parts dimensions chart as following.

The PF30's nylon cups are more tolerant of slight dimensional variations to tighten the BB shell. The hardness of nylon cups is less than frame’s, so it will not damage frame tolerance.

Great Advantages

  • PF30 is LIGHTER-  By eliminating the BB cups and using an alloy spindle, the weight of the crank and BB assembly can be reduced by up to 18%.
  • PF30 is NARROWER- With the bearing inside the BB shell, the crankset can be made narrower in this critical area, increasing ankle clearance.
  • PF30 is STIFFER-  Confirmed by new EFBE testing, the oversized spindle increases the stiffness of the crankset.
  • PF30 is MORE DURABLE- PF30 bearings are significantly larger than GXP systems, resulting in longer bearing life.
Moreover, depending on the frame material there's also less chance of creaking and the larger-diameter shell provides more flexibility for adjoining tube dimensions and positioning

The Standard of PressFit 30

The processing accuracy of PressFit 30 shell inner diameter is 46mm +0/-0.05. PressFit 30 for road will require a 68mm wide shell while PressFit 30 for MTB will require a 73mm wide shell. PressFit 30 standard delivers those without the intricate shell machining and extremely tight tolerances normally required.

The following picture illustrators the dimensions of PressFit 30.

The Difference Between PF30 and BB30

The key difference between PressFit 30 and BB30 is how the bearings are fitted into the frame. PressFit 30 requires only a straight, concentric bore nominally 46mm +0/-0.05 in diameter with parallel-faced ends and that's all – meaning it's easier and cheaper to manufacture while also increasing the likelihood that the finished product will actually meet specifications. There are no interior grooves required for C-clips.

Speedone and PF30

Still, PressFit 30's extraordinarily straightforward dimensional requirements will certainly make it appealing to Speedone bike as it can offer both a performance and cost advantage in most cases – a clear win-win. And the fact that it's so prevalent that Speedone MTB collection have so many PressFit 30 model, such as M8, M5, XCS, and 29er series.

Data Source:SRAM, FSA