Hi guys,
I have a- RK Excel J19X2.15 DOT 1113 front rim and a
Battlax BT46 100/90-19M/C 57H tyre.

Problem is I cannot find an inner tube for it.
A fitter has said the Goodtire 100/90-19 will work fine.
However, online info suggest very differently.
Can anyone tell me what they have used.

Thanks brothers and sisters.

(2014 Suzuki S40 Boulevard LS650F Model SUZ-86A)