i think you could use the deore 12-36 and change the bottom to an 11t (& lockring)

the hg61 12-36 weighs 422g. 😯

other than that i think you are looking at custom stuff (try mtbr)

slx 10 speed groupset is cheaper than an actiontech caseette!!

why the need for 11-36?

Get rid of the front mech, use a 34/11 tooth cassette with your chosen chainring size and you’ll be fine.

I use a 33 with a 32/11

I use Kinetic K-Gear software to see what difference changing gear ratios is going to have.

Does going to a 11-36 make that much difference to using an 11-34???

Depends for a start on what size ring your using up front – if your planning to use a 32 up front you lose your three lowest gears at the back, if you go to an 11-36 you only lose the last two.

If you follow fashion and go for a 34 up front your back to losing the lowest three at the back but gain one bigger gear up front… If it was me, and I had an 11-34 9spd cassette kicking about I would simply give 1×9 a whirl with what I had. If I only had a 11-32 cassette to try I would try it, and beg/borrow an 11-34 off a mate to give it a go.

Changing to 10 speed or even buying new bits at all to “try something out”, when that something can almost be accomplished without the expense seems a little daft.

out of interest where did you guys see the weight? i couldn’t find a published one?