Whilst the standard door mounts allow the door to open fully they are highly prone to vibration because the door itself is a flexible, removable panel,  leading to a blurred image at high RPM or speed.

We provide the following alternatives, each with its own pros & cons.

• Eccles mounts to reduce vibration when fixed to doors
• Pillar mounts to fit to the windscreen stanchions
• Roll cage mounts to fit to a 32mm diameter roll cage
• Conversion kit to use the "Spa Black Nut" with the "Two-Hole" base

1. Eccles Style Mounts

Eccles Style Mounts are the optimal solution for eliminating the vibration issue associated with door mounting while retaining the door's full range of motion.

Benefit: These rigid brackets minimise vibration.

Reason: The mount replaces one of the door's standard hinges. This moves the mirror's anchor point from the flexible door skin to a solid, structural connection to the body tub, which drastically reduces shake and wobble, providing a stable platform for the mirror head.

Specifics: DPR supplied Eccles mounts are made of billet aluminium and have the Spa black nut fixing integrated into the design. Furthermore, your purchase includes a donation of £2.50 to the Caterham & Lotus Club where the design originated.

Purchase Links: DPR Motorsport (Eccles Mounts).

2. Windscreen Stanchion Pillar Mounts

Pros: Provide the most stable, vibration-free image because the stanchion is rigidly fixed to the chassis. Excellent for maintaining clear vision at speed.

Cons: The mirror position limits how far the door can open, that can make entry and exit difficult for occupants. Additionally, when the full side-screens are in place, the mirror on the left-hand (passenger) side can have a compromised view.

Best For: Road use where image clarity and stability is the highest priority.

Purchase Links: DPR Motorsport (Pillar Mounts).

3. Aero Screen / Scuttle Mounts

Pros: Offer the lowest drag and a minimalist, race-inspired aesthetic.

Cons: Not optimal for road use..

Best For: Track days or owners who prioritize aerodynamics thorough eliminating the standard windscreen rather than practicalities. Fitting a DPR black nut conversion kit enables easier and more reliable mirror adjustment.

Purchase Links: DPR Motorsport (Black Nut Conversion Kit).

4. Roll Cage Mounts (Race Cars Only)

Pros: Provide ultimate stability and the lowest drag from the smallest possible mirror heads.

Cons: Requires a full safety cage.

Best For: Dedicated race cars and competition.

Purchase Links: DPR Motorsport (Roll Cage Slimline Mirror Clamp - 32mm).

II. Aftermarket Mirror Units

After-market mirrors with specific features are necessary to maximize the benefits of any mount.  Spa mirrors provide a l;ong established race=proven solution.

Convex Glass: This is the most important upgrade. Using convex (curved) glass provides a much wider field of view than standard flat mirrors, compensating for the small size of the unit.

Lightweight Housing: These smaller mirrors have less surface area which directly reduces vibration and aerodynamic drag. Both the standard Spa FIA mirror (113 mm x 52 mm) and the larger Spa GT mirror (148 mm x 68 mm) are available from DPR Motorsport. Most customers are satisfied with both the look and performance of the smaller Spa FIA mirror, but the larger-sized GT mirror may suit those who want to maximise viewing area and are less concerned over the look/air resistance.

Purchase Links: DPR Motorsport (Mirrors and Accessories).

IV. Ideal Road Compromise

The best all-around solution for a road-going Caterham is an Eccles Style Mount combined with a high-quality, lightweight Spa convex irror with the Black Nut fixing. This setup successfully offers the best balance of full door access and reduced mirror vibration. For those who want the option to run with and without doors, fitting the DPR pillar mounts allows mirrors to be easily switched between the two solutions.