Rob allen rubbers

[spyros]

Hello! I seek for your help. I have bought the blue ones at 17,5mm. Which is the appropriate length of the rubber for a 100cm roballen railgun?

 

[Marwan]

for that thickness i would say 26 cm long for a 100 speargun

 

[spyros]

they've told me that about 54cm(it is railgun) would be ok. Aproximately 3,3 elongation

 

[marginatus]

ist's about what Marwan said:
2*26=52cm
plus 2cm for the loop turn and you have 54cm

 

[spyros]

Thanks!!!!