SIP has just released this CNC-milled 4-piston crake caliper as a direct replacement for the original 2-piston caliper on the Vespa GTS.
Machined from aluminium, with 2x 34mm and 2x 30mm pistons and larger Galfer pads, the caliper should improve brake feel and performance, as well as help to dissipate heat.
The Pordoi caliper is homologated for use on the road and requires no modification of the existing master cylinder, or brake line to fit it. It’s anodised for a long-lasting finish and comes in a choice of black or silver, with the SIP logo milled into the surface.
Tech spec
- Aluminium CNC
- 4 pistons (2x 34mm/2x 30mm)
- Thread connection banjo bolt: M10x1.0
- Thread bleeder screw: M10x1.0
- Colour options: Black, silver
Model fitment
Aside from the 125/250/300 Vespa GTS models, the caliper is also suitable for Gilera Runner VX/VXR,DNA and Piaggio Hexagon.
Price
The rear caliper costs £193.47 and the front £242.01, (plus VAT and import duty), or you can order directly from your local SIP stockist.







