Fastpedaller
Über Member
I would have thought 25Kg is a bit low, it could be that the rear of trailer is lifting the rear of the car, also is the trailer perfectly square, once borrowed a home made trailer, granted a 4 wheeled one, but anything above 40mph & the thing would weave & take on.a life of it's own it was scary to pull & I only borrowed it once. Can you try moving something forward in the trailer & increasing the weight.
As it's a Quantum what is the towbar fastened to? We'll ignore the legalities
The 'online guide' I viewed this afternoon suggested 5-7% of caravan weight, so at only 200kg that's less. it tows beautifully. It is perfectly square (well as close as can be, we all know nothing is perfect!) When I built it I contemplated whether I should introduce a little toe-in on the wheels but decided against it. The Quantum Saloon has a very strong layup across the rear of the boot, and was designed to take a towbar. There is a steel strip which is about 3ft long going across the inside held with 4 M8 bolts (IIRC) - I've no reason to question the strength for pulling a 200kg trailer/caravan. A Quantum club member arrived at Stoneleigh with a 23ft long caravan behind his saloon many years ago - It must have weighed quite a bit more than the car. That's not something i'd do, but is an example of the strength of the Quantum GRP.