The bloke there was very helpful and looked through the headsets they had to find that one. He measured it up against the one I'd taken out and found that the BBB one was actually more like 41.5 or 41.6mm than the 41.4 it's listed as being, so it was only 0.2mm off the one I'd taken out. Having installed it I can confirm that it's still big enough to achieve a secure press fit.
In my search for a headset I also tried Velorution, who were pretty helpful. The bloke in the workshop measured up the headset, but wasn't sure if they had one in that size and told me to come back later on when his colleague would be in who'd know if they had that headset. I also tried Cycle Surgery on Pentonville Road and Evans on Rathbone Place, both of which were predictably unhelpful.
The bloke there was very helpful and looked through the headsets they had to find that one. He measured it up against the one I'd taken out and found that the BBB one was actually more like 41.5 or 41.6mm than the 41.4 it's listed as being, so it was only 0.2mm off the one I'd taken out. Having installed it I can confirm that it's still big enough to achieve a secure press fit.
In my search for a headset I also tried Velorution, who were pretty helpful. The bloke in the workshop measured up the headset, but wasn't sure if they had one in that size and told me to come back later on when his colleague would be in who'd know if they had that headset. I also tried Cycle Surgery on Pentonville Road and Evans on Rathbone Place, both of which were predictably unhelpful.