CeramicSpeed BB ALPHA
Top Pick
CeramicSpeed

CeramicSpeed BB ALPHA

4.5

Best performance upgrade for serious cyclists seeking marginal gains.

Built to survive the harshest conditions, this bottom bracket combines ultra-low friction ceramic performance with heavy-duty moisture sealing. It is a set-and-forget upgrade that prioritizes longevity and smooth rotation over everything else.

Shell Diameter Mm 46
Shell Width Mm 68
68
86
Spindle Diameter Mm 24
24
30
Spindle Interface Type Shimano Hollowtech II

Who it's for

  • Competitive cyclists seeking marginal gains and peak performance.
  • Serious riders desiring a reliable, long-lasting component investment.
  • Cyclists looking to enhance their bike's overall ride quality.

Who should skip it

  • Budget-conscious riders or those seeking value alternatives.
  • Riders preferring low-maintenance components or DIY mechanics.
  • Recreational cyclists not focused on competitive advantages.

Performance breakdown

Rotational Efficiency

Silicon Nitride ceramic balls deliver near-frictionless performance for every pedal stroke.

Excellent

Weather Sealing

Custom-engineered seals effectively block grit and moisture in demanding riding conditions.

Excellent

Installation Simplicity

Simplified spacer tube design makes press-fit setup faster and less frustrating.

Excellent

Weight Optimization

Lighter cup construction sheds unnecessary grams without sacrificing structural integrity.

Excellent

Durability

Hardened stainless-steel races ensure longevity that outlasts the bike frame itself.

Excellent

Component Compatibility

Specific design limits use to 24mm cranks in 46mm pressfit shells.

Good

Key Specs

Bottom Bracket Standard

PF30

Spindle Diameter

24mm

Shell Diameter

46mm

Shell Width

68mm

Bearing Material

Silicon Nitride

Bearing Type

Ceramic

Material

Stainless steel, Silicon Nitride

Water Resistant

Yes

Ceramic Bearings

Yes

Intended Use

Mountain Biking

Know before you buy

Still have a question?

Ask Metto anything about the CeramicSpeed BB ALPHA before you decide.