Also " Perfect fit Hornby 125 37 43 47 52 25 ". If the usual tyres are just a bit too narrow, then these might be what you need.
Hornby R369 Class 37 B.R Blue Diesel . Serviced ,New traction tyres
X8101 L6241 L5716 Hornby Spare Neoprene Traction Tyres ×10
Hornby Dublo Spare Parts - 2 x Traction Tyres For Deltic, Co-Bo, Class 20 etc 1s
X9962 (X6480 X6451) Hornby 10× Traction Tyres for T9 Class (2P, County, Schools)
X9812 Hornby Traction Tyres for Dean Single + Caledonian 4-2-2 R2610 R2683 R2806
X9962 (X6480 X6451) Hornby 4× Traction Tyres for T9 Class (2P, County, Schools)
