• Middleburn RS8 X type 175mm cranks in black fitted with single 32t 3/32nds chainring. These have plenty of scuffs, marks & heel rub (the eagle eyes will have noticed the non drive side bolt isn’t in the pics, this will be replaced before sale) all threads are fine - not easy to find now -£75 posted for the pair seems fair.

    Middleburn mono 104bcd spider in silver to fit RS8 x type cranks - £30 posted

    Middleburn duo 104/64bcd spider in black to fit RS8 x type cranks - £45 posted(these dont come up very often and aren’t available from Middleburn anymore).

    Happy to have a deal on the lot at £130 posted


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  • Let me see if I can get a spider to fit these

  • What spider are you looking for?

  • I need a spider that you can bolt on a bashgaurd to the outside and chain ring to the inside.

  • I think you might struggle with the x type cranks - all I have found in the past were the old trials type bash guards to fit a single ring and they were for the RS7 square taper cranks which won’t fit the x type ones.

    Depending on the chainring size you wanted could possibly use the duo spider with a 104bcd bash guard & a 64bcd chainring?

  • Still available.

  • If they were 5mm shorter they wouldn’t be.

  • lol - short cranks are overrated!

  • So are exceptionally low BB’s

  • Still available.

  • Open to sensible offers on this

  • Still available

  • Still available & open to sensible offers!

  • Could be interested in the Middleburn mono 104bcd spider in silver to fit RS8 x type cranks . Just looking into what effect it will have fitting it to an RS7 square taper crank chainline....

  • Count me out. Chainline is going to be way off! GLWS.

  • No problem at all - the x type spiders don’t work well with the square taper cranks! I’ve been there before which is why I now run the x type cranks on all my bikes! This set is a spare where I change to silver cranks.

  • Middleburn duo 104/64bcd spider in black to fit RS8 x type cranks -
    £45 posted(these dont come up very often and aren’t available from
    Middleburn anymore).

    Can vouch for this, managed to recently pick one up on eBay for £32 after quite a bidding frenzy. GLWS.

  • To be honest out of all of it that would be the bit I keep - I run these on both bikes!

  • Duo spider now sold.

  • Still available (apart from duo spider) & open to sensible offers

  • I’m interested, are they the mtb width axle? Frame I’m thinking of putting them on is 73 bsa shell.

  • They are indeed - will fit either 68 (with spacers) or 73mm shell width.

  • Just double checked & this is fitted with the 138mm axle which is fine for 68 & 73 mm shells


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  • Now sold.

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Middleburn RS8 X type (fits 24mm hollowtech BB) 175 cranks & extra spiders

Posted by Avatar for MarkT @MarkT

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