Peugeot 308 SW 1.6

[Sheltersteps]

Hi, I’ve got a 308 in my garage at the moment with ABS problems, just fitted new rear disc’s/hubs and on checking air gap between sensors and reluctor ring I find one gap much closer than the other, can anyone tell me what the gap should be ?

[E-bmw]

What are the ABS problems by the way?

Are the sensors fitted in correctly?