THE RR SPEED E2 2WP AND 4WP BRAKE SYSTEMS

TKART Staff

07 February 2018

In 2018 Righetti Ridolfi has confirmed and extended the homologation of its Speed E2 2WP and 4WP brake systems, already tested over the years on the Italian company’s chassis and with proven performance and reliability. Let’s find out the details

BRAKE SYSTEM

REAR BRAKE

FRONT BRAKE

CHARACTERISTICS

ADDED VALUE

TECHNICAL SHEET

The “Speed” brake system is one of Righetti Ridolfi’s signature products. Just think that its first homologation (only for the rear brake) dates all the way back to 2008. In 2011 the homologation was renewed, adding “EVO” to the “Speed 2WP” name. That year the Speed EVO 4 WH was presented as well, complete with front brakes.

The two 2018 homologations are substantially a confirmation of these, with no design modifications and with the extension of the system’s validity for the next three years. A confirmation of how the Righetti Ridolfi product has been particularly successful and valued by the public. Today, the correct names for the systems are: Speed E2 2WP and Speed E2 4WP. The first is dedicated to the non-shifter categories; the second, which calls for front brakes as well, is for the shifters. That aside, the two products are identical.

A comparison (taken from the homologation sheets) between the various versions of the Righetti Ridolfi Speed brake over the last 10 years

BRAKE SYSTEM

REAR BRAKE

FRONT BRAKE

CHARACTERISTICS

ADDED VALUE

TECHNICAL SHEET

As far as the rear brake (the same in the 4WP and 2WP) is concerned, the system, naturally hydraulic, presents a self-ventilated aluminium disc that’s 200 mm in diameter and 18 mm thick, 1 mm more than the model from 6 years ago. Circular channels are engraved into its surface to favour the brake pad cleanliness. The contact zone (between the pads and the surface of the brake disc) is a crown with an inner diameter of 136 mm and an outer diameter of 199 mm. The maximum length of the pads is 89 mm and their inside is studied to obtain a distance from the brake disc that reduces friction and overheating.

The calliper is machined from a solid and made with 4 pistons per side, with differentiated diameters between19 and 22.2 mm, activated by a single master cylinder with a 22.2 mm-piston. The central body has a bridge structure that increases the accessory’s overall hardness. The calliper is also self-registering, with automatic recovery of brake pad consumption.

It weighs just over 1 kg.

BRAKE SYSTEM

REAR BRAKE

FRONT BRAKE

CHARACTERISTICS

ADDED VALUE

TECHNICAL SHEET

In front we find callipers with specific techniques similar to the rear brake: a dedicated master cylinder with a 22.2 mm-diameter piston, and smaller pistons (in this case, 3) 19 mm in diameter. The discs are once again in aluminium, self-ventilated and with the circular channels dug into the surface to favour brake pad cleanliness.

What changes, naturally, is the size of the discs, which have an outer diameter of 160 mm and a thickness of 12. Consequently, the contact zone has an inner diameter of 91 mm and an outer diameter of 159. The maximum length of the pads is 85 mm.