From Wikinline

Specifications

Part	:	Rollerblade TRS frames (2008-2010) - Frames
Spacing	:	UFS

Overview

The composite frames from many of the Rollerblade aggressive skates.

Details

• Exists in 3 sizes, called 3, 4 and 5.
• Size 3 on 21.5-24.5 skates, 4 on 25.0-28.5 and 5 on 29.0-30.5 sized skates.
• Size 4 measures 263mm.

Original Parts

• Rollerblade TRS axles.
• Rollerblade TRS spacers.