First MTB tandem build complete. And tested!
I almost finished this two weeks ago but then had to make three attempts to get the correct Shimano Thru-Axle (not the SM-AX56, not the MT-500, the SM-AX58-just right!). I had a previous thread (link) for advice, so many thanks again to all on there. This is supposed to be for me and Mrs Gaidong to get out on the local trails but, as you see with the stoker saddle, slammed my 10 year old son can also get one (cue upset 8 year old daughter). I’ve gone cheapo but solido for the core: EXS alu frame for €380, bike-components.de special Fox 34s in 140mm pedelec, self-built Ryde Andra 40 rims on Shimano 36 spoke hubs (Zee rear, XT front) shod in Schwalbe NNs, XT/SLX transmission plus a spattering of of Easton Haven here, bit of Raceface Turbine/Chester there. Total build cost? Dunno and don’t wanna know. First ride in the woods after the storms, gritty and grinny. Pretty happy with my front derailleur set up as it’s supposed to be a top pull and I just bodged a Sideswing and ran the brake and two derailleur cables together on the NDS. Oh yes, Zee brakes on 203 mm rotors.
Off you go then, lay into the few pixels of lawn and hedge you can see – precisely zero sh1ts will be given :D.
Posted 1 week ago
Thanks TJ. I’m usually in SPDs but the missus and son are just starting out so I’m trying to minimise the fear points. The important issues are covered though; she likes red and I like green…
I know the saddle looks daft but all my bikes look like that and I’ve only got really sore shoulders to suggest it might not be ideal 😀Posted 1 week ago
The FD was a bit of a shot in the dark. I’m running 24/36 steel chainrings (will swap to a 38T when I can find a ‘middle’ one. The FD is a M7000 jobby, so 2/3 speed, with a M8000 2/3 speed shifter. Honestly I just whacked it on, set the stops, and it worked straight off!
GaidongPosted 1 week ago
No, if I rotate one of the cranks a single link it looks even further out. Not sure why it’s like that to be honest but I set it so I would hit the power (ahem) first to hopefully avoid the chain coming off.
Son stoker was happy. I mean, I scared him a bit but what’s the point in being a dad with a 10 year old if you can’t push his limits a bit.
I think I’ve got a spare 31.6mm seat post but really, I don’t think I want my daughter on there just yet. She’s such a dreamer she’d probably forget to hold the handlebars or something.Posted 1 week ago
TJ, you were right. It was one link out. Just didn’t look right when I didn’t have the EBB tightened. All is well in the world.
Spooky, I am not a buyer of odd sockdom but Bez’s port v starboard idea could be a winner. I’ll have to do cut ‘n shuts on the handlebars too!
Funkmaster, thanks for the wishes, my fingers are certainly crossed.
Riding it to work tomorrow morning, alone. It will be fun going through the security checkpoint and not smirking in front of the machine-gun toting guards.Posted 1 week agoDickyboyMemberchippsSubscriber
Nice work! Glad TJ pointed out the timing chain one-tooth-out error. Apart from that, it looks great.
Is that a Thudbuster? I’ve recently moved the rear saddle on my Thudbuster forward as stokers were complaining about the ride being too recumbent, but they’re great things.Posted 1 week ago
Aye, ’tis a Thudbuster LT.
Rode to work today with Mrs Gaidong today (dropped her at the gate and then she ran home). First issue, she is a grinder (of sorts :D) and me a spinner – a cadence compromise looks mutually dissatisfactory at present. She liked it though, despite her worries of me guffing in her face all the way (got my son a beaut yesterday). Had a few turns around the base with work colleagues and rode home alone offroad in the mud. All good.Posted 6 days agoBikePawlMember
Posted 6 days ago
Bez’s port v starboard idea could be a winner
Let me know when you get to the point where you find out why it really couldn’t
just take bodies of the front right axle and back left axle and swap
Very nice. Timing chain alignment is a whole can of worms. Captain leading by two links is common, as is stoker leading. As per TJ, I’d have some taller/wider riser bars, you are the one balancing that tandem, and it’s a bigger workout than a single bike. Practice standing up together, on road tandems it’s normal for the stoker to stand up to adjust position and relive the pressure. They get beaten up a lot more, so nice to see a thudbuster. Call “up” and “bump”. Often. Or you’ll be looking for a new stoker!
It’s not widely advertised, but the stoker gets a much better time. And is always right.
The rule of tandems:
“Wherever your relationship is going, you’ll get there faster on a tandem”
tandem@hobbes is a bit quiet these days of social media, but I’ve been on there for years.Posted 6 days ago
No Roc for me this year. I like the landscape but I can’t stand the traffic jams on the trails. A lady team from my club did very well on the Roc tandem last couple of years, first in class or something. I built one after ogling theirs (tandem).
I’ve been calling out the bigger bumps so far but certainly am not communicating gear shifts enough. Got a 750 mm bar for me and started cutting down the stoker’s bar yesterday (725 to 700) as they have enough leverage to spin my seat post however much I tighten it!Posted 5 days agonbtMember
Looks great though like TJ I’d want pilot handlebars a little higher – arse high nose low might be great for racing but not sure I’d want it on my tandem!
Mrs NBT can’t use SPDs anymore, so we have flat pedals with a toe cage for her on the back (I use SPDs on the front). When we first tried off-road tandeming I had JUST converted Mrs NBT to flat pedals so that’s what she used – first serious downhill she got a faceful of my back as she was jolted forwards out of the saddle when we went over a bump. We used SPDs for a while but as above have now gone back to flats with a cage, would recommend you consider that for the sake of keeping the stoker in placePosted 5 days agoswitchbacktrogMember
I would narrow the rear bars down even more as they are only somewhere for the stoker to rest their hands. If they are too wide then you will be forever catching them on trees and gate posts as the rear cuts in on the corners. like this………….. The fronts are 720mm, rears are 580mm. 700’s will catch on everything especially on narrow single track.
Posted 5 days ago
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