Heavy duty Factor 12″ Thorn Resistant Bicycle Tubes are a great way of avoiding punctures and flats from thorns and thistles. This all new 12-1/2″ thorn resistant tube is ideal for a replacement or spare – you never know when you’re going to need one! The tube size is 12-1/2 x 2-1/4 and has a schrader valve.
- Fit tyre size: 12½ x 2¼ (57-203)
- Heavy duty thorn resistant tubes are a great way of avoiding punctures and flats from thorns and thistles
- Ideal for a replacement or spare – you never know when you’re going to need one!
- Valve: Standard schrader valve (car valve, A/V)
- Price is for 2 tubes

Schwalbe Land Cruiser K-Guard Tyres 700 x 47c (47-622) (29 x 1.75) Black (2 Pack)
Schwalbe SV15 Inner Tubes – 700 x 18-28c, Presta 40mm Valve (2 Pack)




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worked for what I needed
There is lots of calthrop where I live so it will test these tubes out.
just needed a couple of spares.
Very good quality product