i have put together a 1x8 set up am running 12-23 with 40t up front with a long cage rd.
can i run a greater spread on the back? if so what 11-33 does the rear spread relate to the size of the teeth okn the front? what is everyone else running on their 1x set ups?
Rear derailleurs have a maximum wrap/takeup (total difference, i.e. small/small compared to big-big) and a maximum rear sprocket size (your 23 or 33T). If you keep within those limits (or slightly exceed them) you’ll be fine.
For a long cage, 1x & 11-33 should be a-ok, as it’s designed to work with a triple and a wide range rear.
Check your b-screw adjustment with the new cassette, otherwise you shouldn’t have to adjust anything.
You will need a new chain if it’s currently correctly sized for the 40x12-23.
chain was the one thing i forgot to ask about, the rd is 9(shimano altus, until i get a xl) spd but my trigger shift is 8 spd as is my casette is there much difference in 8/9 spd chains?
Not much, only the outer width varies. If an 8sp chain fits through the cage of your mech, use it, cheaper and lasts longer. If it doesn’t, get a 9sp chain.
Ratio wise, the 40 tooth up front should be good for the road. I ran a 39 tooth with 12-23 on the rear for a long time and it was pretty good. Now I have a 42/53 tooth up front and a bigish 13-26 cassette and it is great for me. Small ring at the front and mid-cassette is really comfy for cruisng around town.
But I would see how you go with what you have got and increase the range if you find that you are running out of gears.
totaly AT THE Mo’ its great i have achieved some sort of balance, the frame is perfect the wheels are good and the range does the mountians where i live and the city, but i wanna do some longish riding 100km plus and think i would need some more granny ratios.
The bike itsself is ugly but the geo,size, and the mabo is perfect.
Since I broke a Sram Double Tap shifter last week* I’ve switched to a 1x10 with a barcon shifter. 44T with a 27/12 cassette but I can’t use the 27T because the rear derailleur’s so shagged that it flexes into the spokes on the 27T. I’ll fix it properly when a good and cheap Ultegra or 105 derailleur comes up.
I’ll probably change the 44 to a 41T by the weekend.
And to everyone who doubts it but haven’t tried it themselves…barcons are the awesome.
I have a 48 front and 13-30 rear - 1 x 7 with a friction L/H barcon doing the do. No problems with an old long cage shimano. I had a short cage, that did change but wasn’t happy about it/ wouldn’t of lasted long.