String. something to do with string. I think you tie it round one dropout, wrap it round the head tube, then hold it tight round the other, and then look at the string in relation to the seat tube. An equal gap between the string and the tube on each side means the alignment is good.
Or something?
Yeah, this would work fine...but best to use a tape measure to measure the gap between the string and the seat tube. Although this isn't a perfectly exact method, it's more than good enough!
Or, ask if they have one of these in their workshop...a park frame alignment gauge:
(Although, i wouldn't get my hopes up for any branch of halfords having one of these?!)
Yeah, this would work fine...but best to use a tape measure to measure the gap between the string and the seat tube. Although this isn't a perfectly exact method, it's more than good enough!
Or, ask if they have one of these in their workshop...a park frame alignment gauge:
(Although, i wouldn't get my hopes up for any branch of halfords having one of these?!)