I'm attempting to run my bike as a temporary SS just until I get my hands on my new rear mech (early next week)

I've tried all my LBS's and bizarrely not one of them had a chain tensioner in stock - including Dave Mellor Cycles, a top-10 BS in the UK

Anyway, I've opted to have one fast tracked from the Halfords website.....here it is:


I should point out that my hybrid has a full Alivio groupset (old style 3x7 with freewheel) and for whatever reason I mistook 'Alfine' for 'Alivio' and now it's too late to cancel my order.

So, my questions is, will the above chain tensioner be compatible with my current Alivio groupset?

My aim is to run the chain around the largest chainring and the smallest cog on my freewheel, which I believe is a 14T

I have tried finding a match without the tensioner but no such luck unfortunately.......either too tight or too loose

Thanks