Planet X Jack Flash Raw

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  • Bought one of these for wheels firmly on the ground local pump track use. Will be running it Single Speed, mostly from my spares but bars & stem were donated by a neighbour when I told him my build plan, and the ztto headset the only one I could source at a price reflecting the project.

    Fork = Reba Race, Hope seatclamp, Hollowtech BB ready for old SLX crank.

    I have an old richey seat post that fits for holding slammed saddle, most likely use a charge spoon. On-one chain tensioner ready to go on too.

    I will need to source a rear brake, reckon avid bb7 best bet as I still have a few sets of compatible pads knocking about unopened. This would double project spend and push it into 3 figures.


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  • I was always tempted by these frames. Looks ace.

  • yeah with some 26" wheels from the Superstar Sale you could do a bargain build.

  • Looks fun

  • One step closer... NOS ODI Ruffian, Ison Distro promo by look of it. Fiver.


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  • Tidied up the old slx 9sp triple too, will be running it with that for now 1x with 32t upfront, assuming I can get chainline sorted.

    Any recommendations for a niceish hollowtech 1x upgrade to consider?

  • Might have a spare BB7 kicking around. Will try and remember to have a look tomorrow morning.

  • That would be brilliant if so, thanks. Cash money or beer available.

  • A week late, but would a ratty set of xt hydros work? May need bleeding, but might be knackered. I'm never going to bother doing anything with them.

  • That'd be ace to give them a try. I can swing by after work tomorrow, Weds, or Fri most likely (edit: I'll take it to WhatsApp)

  • I think it is finished. Rainy so no test pedal on path even. Not great pics, but gives the idea.


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  • That looks like it's a blast to ride

  • I've still not ridden this as I've not been well enough for long enough.

    I have replaced the chainring with a blue raceface one. It is still 32t but reading around 30t might be better for pump track ratio so I have one of those put aside just incase also.

    I swapped the cranks & bb over to fit some old bombshell velocity so the slx can go back on my inbred for another rebuild.

    I have some blue dmr deathgrips too, which colour coordinate more and also have some blue rotor bolts to fit as a finishing touch.

    Then, maybe I'll ride it before the winter is out.

  • Depending what's on the rear (hard to see but it looks between a 16-18T) you don't want a 30T up front, you shouldn't really be pedalling once you are going. Always nicer to do a quick turn on a higher gear between rhythm sections as too low a gear spinning can throw you off balance or risk slipping a pedal IMO.
    I would also say drop a link or two out that chain so you get a bit more wrap around the rear sprocket. I don't want you to have a skip just as you are cranking.

  • Great advice, thanks. It's a 16 at the back iirc. Skip free preferred so thanks again I'll shorten chain.

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Planet X Jack Flash Raw

Posted by Avatar for rhb @rhb

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