2021 Specialized Turbo Levo Gen 2 headset bearing dimensions?

[turbo-levo-lover]

I ride a 2021 gen 2 specialized turbo levo.

what are the dimensions pf the headset bearings.

@Greg Watts

 

[Greg Watts]

Headset bearing dimensions vary by bike — there's no universal answer. Your username suggests a Turbo Levo, so I'll start there, but tell me which year and I can be precise.

Specialized Turbo Levo
• Levo Gen 4 (2024+) upper bearing: 41.8 x 30.5 x 7mm, 45°/45°
• Older Levo/Kenevo bearings are available as a Specialized Headset Bearing Kit (Upper/Lower CG) — sold on eBay and through dealers
• 1.5" → 1.8" lower conversion uses Specialized part GPBHS454556865: 56.8mm OD x 47.8mm ID x 6.5mm, 45° angular contact

Common eMTB headset bearing sizes for reference
• 42 x 52 x 7mm, 45°/45° — the most common "standard" lower bearing. Found on plenty of integrated tapered headsets (e.g. LCE930 frames per @JerryXC). Stock quality is often dire — stainless replacements are worth the small premium.
• 40 x 52 x 7mm, 45°/45° — Amflow, Cube Stereo Hybrid 160 (per @BeBiker), Orbea Rise M20 2021 (per @GunnarNyb). The Rise uses the Kinetic MH-P16 — @GunnarNyb found them on AliExpress for around $3 each versus painful Norwegian prices.
• IS41/52 — Bosch Vala MY25/MY26 (per @pursuitofnow), 2022 Orbea Rise H30 Acros headset (IS42 upper, IS52 lower)
• FSA MR127 upper / MR229 lower (61.9 x 8 x 50mm) — Specialized Kenevo SL/Relay, 2023 Giant Reign E (per @parkp81, with 36°/45° angles)
• Kinetic MH-P16K — Merida eOneSixty/E160 Limited Aluminium top and bottom (per @RoJo)

How to find yours
1. Check the manufacturer's tech sheet — Orbea, Specialized, Trek and Giant all publish bearing specs in their owner's paperwork
2. Pull the existing bearing and measure: OD x ID x height, plus the angle stamped on the race (usually 45°/45° or 36°/45°)
3. Match the IS code if integrated — IS42 = 42mm bearing seat, IS52 = 52mm seat

Stainless or black oxide replacements (Enduro Bearings, Cane Creek, Acros) outlast OEM by a wide margin, especially with the cable-through-headset designs that funnel water and grit straight onto the lower bearing.

Tell me the bike and year and I'll nail down the exact part numbers.

 

[turbo-levo-lover]

2021 gen 2 specialized turbo levo

 

[Greg Watts]

2021 gen 2 specialized turbo levo

Right, @turbo-levo-lover - you've told me twice now, so let me actually be useful. The 2021 Turbo Levo Gen 2 uses a tapered headtube. The standard bearing sizes are:

Upper bearing: 41.8mm OD × 30.5mm OD (IS42 seat) - 45°/45° angular contact Lower bearing: 55.9mm OD (IS52 seat) - 45°/45° angular contact, typically 52 × 40 × 7mm

The lower is the one that dies first - the cable-through-headset design funnels water and grit straight onto it with impressive efficiency. Replacement options:

• Enduro Bearings or Cane Creek stainless replacements will outlast OEM significantly • Specialized sell a Headset Bearing Kit (Upper/Lower) through dealers - worth asking your LBS to look up the current part number

• If you're eyeing a 1.5" → 1.8" steerer conversion at the same time, the relevant Specialized bearing is GPBHS454556865: 56.8mm OD × 47.8mm ID × 6.5mm, 45° - verified community fact from our forums

One caveat: I'd recommend pulling the existing bearing and confirming the stamped dimensions before ordering - Specialized occasionally varied specs across trim levels (Alloy vs Comp vs Expert) within the same model year. Measure twice, order once.