Key Features & Benefits – ACL Race BMW M5 S85B50 V10 conrod bearing set +0.25 mm
ACL Race BMW M5 S85B50 V10 conrod bearing set +0.25 mm is intended for BMW M5 S85B50 V10 applications with a tri-metal bearing design. The construction is designed to withstand higher RPM operating conditions.
It uses a high-strength backing with a reduced-thickness overlay approach to support fatigue properties, and the set comes with identical halves. The +0.25 mm oversize is used when your rebuild sizing and measured oil clearance call for that variant.
When is this useful?
In a rebuild, the +0.25 mm oversize helps you plan rod bearing fit when crank pin and housing measurements point to that oversize for the intended clearance and consistent seating.
Technical specs
- Type: Conrod bearing set
- Application: BMW M5, S85B50 V10
- Size: +0.25 mm oversize
- Part number: 10B1580H0-25
- Construction: Tri-metal
- Tunnel: 56.000–56.013 mm
- Shaft: 51.975–51.991 mm
- Max wall: 1.998 mm
- Max length: 15.9 mm
- Half type: Identical halves
Selection & installation tips
- +0.25 mm check: Measure crank pin journals and confirm +0.25 mm is the correct oversize for your rebuild.
- Housing & tunnel: Check rod housing size and roundness, then compare it to the listed tunnel range.
- Oil clearance: Verify oil clearance during mock-up using the same measurement method across all rods.
- Bearing seating: Even with identical halves, confirm proper seating and clean locating tang engagement.
- Clean assembly: Clean oil passages and mating faces, then use assembly lube before first start.
Before final assembly, verify +0.25 mm sizing, tunnel and shaft ranges, bearing seating and measured oil clearance, then compare them to the technical specs listed above.
