Insight Bottom Bracket Euro ISIS

Overview

The Insight Euro ISIS is a sealed bottom bracket designed for BMX racing bikes with ISIS crank compatibility. Available in 113mm or 118mm widths with sealed bearings, this component delivers reliable crank support and smooth rotation for racing and high-performance riding.

Key Features

• ISIS Spline Design — Modern spline interface provides secure crank engagement with reduced play; superior to square-taper geometry for rigidity and reliability
• Sealed Bearing System — Protected bearings prevent dirt and moisture infiltration; extends component life and reduces maintenance in wet and dusty racing conditions
• Dual Width Options — Available in 113mm or 118mm widths to accommodate different frame bottom bracket shell dimensions; allows proper crank positioning and chainring alignment
• 34.5mm Outside Diameter — Standard sizing ensures compatibility with most BMX racing frames and ISIS cranksets
• Lightweight Construction — 275g total weight (118mm with screws) represents weight savings compared to square-taper alternatives while maintaining durability
• Racing-Focused Design — Engineered for the demands of BMX racing where reliability and consistent performance are critical

Technical Specifications

• Type: ISIS spline (Euro ISIS)
• Width options: 113mm or 118mm
• Outside diameter: 34.5mm
• Bearing system: Sealed bearings
• Weight: 275g (118mm width with screws)
• Application: BMX racing

Compatibility & Ideal Use Cases

Compatible with all BMX racing frames and ISIS-spline cranksets. Measure your bottom bracket axle length to determine whether 113mm or 118mm width is required; incorrect width selection will result in improper crank positioning and alignment issues. The sealed bearing system and ISIS spline design make this component ideal for BMX racers and riders seeking reliable, low-maintenance performance with improved crank security. The lighter weight and superior spline engagement compared to square-taper alternatives make this an excellent choice for racing applications where consistent performance and minimal play are priorities. Well-suited for competitive riders and those upgrading from square-taper systems.

Width 113 or 118mm ?
Measure the bottom bracket axis you wish to replace.
L = length of the bottom bracket axle.