The spare carrier with a locator kit for larger tires will break as you have seen.
You need one of these.
I'm hanging a 35 off of it with no problems. I've had 2 stock carriers with relocator kits develop cracks.
You need one of these.
D44 Discovery 2 Oversized Wheel Carrier
Heavy Duty wheel carrier for oversize tyres - Discovery 2
www.devon4x4.com
I'm hanging a 35 off of it with no problems. I've had 2 stock carriers with relocator kits develop cracks.