Tow strap bolt size

Technical Area Motorsport & Trackday Preparation
1
  1. My model of MX-5 is:NC 10’
  2. I’m based near:Chester
  3. I’m looking for technical help or recommendations on: Tow strap bolt

Hi guys, I’m booked onto a trackday next week and ordered a toe strap. This doesn’t come with a bolt, I’ve had a quick search but could someone link me to the correct size bolt. I’ve have a nc 3.5. Any help much appreciated
Cheers Chris

2

I’m not sure that the bolt should be used to tow the car. I thought the bolt was for tying the car down e.g. for shipping.

The AA/RAC guys tow by tying their straps under the car to the chassis/suspension mounts when they load onto tow vehicles etc.

I would check this out fully before towing with the eye or you might bend the front if going up a ramp/hill.

Roy

3

Towed many MX-5’s by the “tie down point”, it will be fine.

1 Like
4

Hiya, from an old thread on here;

“ 20 mm diameter with 2.5mm pitch. So 20mm metric standard coarse thread.” Oh, and right hand thread from the looks of it too!

One source,

https://www.westfieldfasteners.co.uk/A2_ScrewBolt_HexHd_M20_THRfull.html

(I’ll let someone else join in about the unsuitability of A2 stainless bolts) :nerd_face:

Zinc plated equivalent here,

https://www.westfieldfasteners.co.uk/BZP-10.9_ScrewBolt_HexHd_M20_THRfull.html

Hope that helps?

Barrie

5

Morning Roy, I think you’re getting mixed up with earlier models? OP has a mk3.5 and they all have a separate towing eye bolt that screws in to a threaded receiver front and rear of the cars?

Looks like this,

image
image1035×783 86.5 KB

Barrie

6

Cheers Barrie, much appreciated!

Very noobie question, how do you recover the Tow cover in the grill is it a push pull kinda thing?

Edit - Sorted just needed a bit more force than I thought would be needed : )

Thanks again

1 Like