Is ISIS Drive the same as Shimano Octalink?

Not exactly. Octalink V1 and V2 are Shimano-proprietary; ISIS Drive is an open standard with a compatible but slightly different interface. ISIS Drive tools work with Octalink V2 and most ISIS-standard cups, but Octalink V1 requires a specific tool. Verify which standard your BB uses.

Can I upgrade from ISIS to Hollowtech II?

Yes — if you replace both the ISIS BB and the ISIS crank with Hollowtech II compatible components. This upgrade is worthwhile if parts availability for your current ISIS components is difficult.

Icetoolz

Icetoolz Shimano ISIS Drive BB Tool 20-tooth

Name: Icetoolz Shimano ISIS Drive BB Tool 20-tooth
Brand: Icetoolz
SKU: CMB_EAS_4718152111135
Price: 790.00 INR
Availability: InStock
Author: InstaSport Editorial

₹790.00

Description

The Icetoolz Shimano ISIS Drive BB Tool (20-tooth) is a splined driver tool designed for ISIS Drive and Shimano Octalink bottom bracket cups. ISIS Drive was the 8-spline standard adopted by brands including Shimano (Octalink V2), FSA, Race Face, and Truvativ in the late 1990s through 2000s. The 20-n