I don’t know much of the MG’s but there are enduro racers who run them but those are mainly shifter racers but I wouldn’t be afraid to try them on enduro racing especially if I already had them. I would question why you are going to a wider tire for enduro racing?? We ran and the driver who drives our sprinter now runs 10/4.5/5 on the front and 11/5/6 on the rear (Bridgestones) and both drivers were/is fast. From our experience, wider for sprint and narrower for enduro including narrowing up our chassis. Not sure what tire pressure you run on sprint but in enduro I would go lower (12-14). We always ran higher AP on sprint vs enduro.