Sorted Bits to complete a build - short cranks, brakes, shifter, cassette

[Fatal Swan]

Trying to complete a build on a kids bike at the moment and I'm short of a few parts. Nothing fancy required since it'll be outgrown as soon as I know it - I'm thinking mid-range Shimano or equivalent, though I can consider slightly nicer if it's at a decent price! What I need is:

A set of fairly short cranks that I can use with a 1x chainring. 165mm would be great if I can find some (I doubt there's anything shorter than that around). Condition not that important and I'm not committed to any specific type, though I do have a couple of spare HT II bottom brackets so something Shimano HT II would be handy.

A set of disc brakes (ideally hydraulic brakes) - again nothing special required, but functional/reliable is important. Again Shimano is probably ideal but others considered. It's an XS 26er frame, so the hoses can be short, I imagine I'll need to cut the hoses and bleed them anyway.

A rear trigger shifter, compatible cassette (Shimano HG fit) and maybe a rear mech. I have a 9-speed Shimano rear mech I could use, but happy to go with a 10 or 11 speed. It would be good to have a cassette that goes up to at least 36t which is already pushing it at 9-speed, even better 40t.

NOW SORTED - cheers

 

[Fatal Swan]

Quick update - I think I'm good for cranks now, I've just found these https://www.aliexpress.com/item/1005006933903799.html
on AliExpress and with short lengths (155mm is ideal) and a choice of chainring size for £36 all in, I think it's probably going to be a better bet than anything else available

 

[ishaw]

I've got the drive train left over from my eldest son's bike that he outgrew. I sold the frame (small hardrock) and forks but have the rest. Brakes are deore, and have 10sp deore shifter, mech and I think it's an SRAM cassette. All did very few miles. It's been sat in a box in the garage since the split. I was going to use it for his next bike, but ended up giving him a build I did for myself that turned out to be too small for me, and lucky for him in all it's xt glory.

 

[Frankenorange]

For short cranks check out Box Five cranks. They are sq taper and for junior BMX. Sizes 130-170mm and sold on ebay. A bit spendy, but do come up second hand. Another option for super short are Crupi USA cranks. I know they go down to 140mm (maybe lower) and again for junior BMX and the vintage ones are sq taper.

Box 5 and vintage Crupi are both 5 arm 110bcd.

Another one i know of is Miche Young cranks. These go down to 125mm BUT the chainrings are 5 arm 116bcd so not so easy to play with ring sizes. Sq taper. Just remembered....i have 1-2 rings for these. Can't remember what size they are but are barely used.

New options at 165mm are XD2(110bcd with a hidden bolt) and RD2(130bcd 5 arm not hidden) cranks from Spa Cycles. I think they are £30 a pair without rings. I am sure Spa had them in a shorter length like maybe 160, but i might be wrong on that count.

 

[Minifreak]

Got those GOLDIX cranks on my boys bike, very impressed with the quality including built in guard and BB.

Went with a 10 speed Shimano Deore cassette, mech and shifter and M445 disc brakes for a quality and robust yet not expensive build. Ian’s set he mentions above will be great on a kids bike

My sons still got another bike size to go through before he’ll fit this but can never be too ready!

 

[36hours]

Sent you a PM about brakes

 

[Fatal Swan]

Cheers, now sorted! Going to give the AliExpress cranks a go, sorted too for a 1x10 Shimano groupset.