Sugino crank thread - RD, Comp, 75, Super Mighty cranks

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  • I was told by Greg at London FIelds Cycles ( one of the best mechanics in london) that, i must pay attention to those things as in the past 10 months he had about 6 or so coming into his workshop....after snapping!!!!!
    SO he said to pay extra attention at the arms as they are bound to crack in between a year or 2 of usage.

  • sugino comp they're not the 75's are they ?

  • no, look similar but are miles apart on quality
    I was reccomended to get shimano cranks or just go for the 75
    Shimano £40, never seen one brake
    Sugino 75 nice but pricey.
    These 2 are my only option as i would only use black cranks

  • what about fsa ones? they come in black too

  • at £274

  • How can you tell which are the Comps? I have suginos on my Flyer. What are the markings to look out for?

  • I had some sugino cranks on my mountain bike a while back. I snapped them too, right in the middle of traffic, didnt fall off, but wasn't very dignified either.

  • They will not be 75's on the Flyer.

  • The flyer's stats helpful state that they're 'Sugino track' cranks which is meaningless. They're definitely not 75s.

    75s look like this. BCD is 144mm

    RDs a bit like this. BCD is 130mm.

    Comps cranks, I believe are just the RD cranks with a cheaper ring made in bulk for the Langster, Flyer etc. Look at the stamping inside, should give some indication. But I have nothing definite to back this up.

    Sugino's website doesn't list Comp as a model, which makes me think they're just rebranded RDs. However they could be made with the same tooling but using cheaper materials. Anyone know?
    http://www.suginoltd.co.jp

  • I have the RDs, which do seem to flex quite a bit

    http://www.bikesportmichigan.com/reviews­/crank.shtml

  • I had a set of RDs - then hit the lhs one on the kerb and rounded out the spindle. Looking for a replacement I found that they're a road crank rebadged for fixed use, and also come anodized black and called 'messenger RD' and also come rebadged by On-One.

    Nobody had any in stock so I bought a set of Miche Pista so that I could get back on the bike sooner. They're immensely better.

    edited to add - which is mainly down to the fact that, combined with Miche BB, they make for a much better aligned drivetrain and they've never worked loose, nor has the bb cup unthreaded itself. simple things from a better thought through design i think.

  • I know they´re not 75s on the Flyer. I remember from looking lastnight, that RD was stamped on the back, and they did look pretty roughly finished in the hidden areas. Hhhmmmmmmm........

  • I've heard a few cases of the Sugino RD (?) as supplied on the Langster's snapping after a while - always the left crank. They are double chainring cranks, with one steel chainring, they were on my 2006 Langster. The machining/casting leaves a lot to be desired.

    Does that echo what the shop mechanic, Greg, reports?

    I sold my set on Ebay, replaced them with NJS Sugino 75's, these are immeasurably better - rigidity, machining, 144 BCD etc ...

    In the past I have also used the latest Dura Ace (Octalink type, until that bike was nicked from Poland Street) I also highly recommend these.

    Had a bit of experience with the Campag C Record track cranks, also awesome! I'd personally steer clear of the old school design Campy fluted 60's/70's cranks, they suffer from fatigue cracks and breakages ... that's why you see so many left or right only cranks on Ebay, as opposed to pairs :)

  • was looking at buying some sugino 75 cranks can someone tell me what size should one buy

  • I'd go for large - even if you're hungry you can never finish a super size.

    What do you mean by size? 165 or 170 (crank length)? chainring size? BB spindle length?

  • %

  • height of your BB and leg length are the key variables I think

  • also your breast cup size.

  • robbojnr was looking at buying some sugino 75 cranks can someone tell me what size should one buy

    I will guess that this is for a fixed gear bike (?) - then 165mm might be a good choice as you cannot level your cranks when you corner (the drivetrain will keep the cranks rotating) so 165mm might help you keep the cranks (pedals/shoes) from making contact with the ground.

    But that is just a very wild guess as you have not told us what you are planning to do with these cranks.

  • As hippy's site says "Not all tablespoons are the same." We need to know whether your baking this cake in Australia, Canada or the UK before we can really help you, robbonjr :)

    (If you're referring to 165 or 170, which I'm guessing you are, i'd go for 165 if it's going on a conversion, due to the lower BB height on road specific frames. 165 will make your crank's turning circle a centimetre smaller, which means less leverage which means it's relatively harder to turn the same gear with 165 vs 170. I didn't think i'd be able to tell the difference, but i definitely can. For me the gear ratio 46x17 feels heavier than 48x17 because of the 165-170 difference. I guess it could've been another factor though)

  • 165 will also help with top overlap.

  • Top overlap is shit, I measure all of my tshirts/sweaters to make sure they don't overlap my belt at all.

  • wheels [quote]robbojnr was looking at buying some sugino 75 cranks can someone tell me what size should one buy

    I will guess that this is for a fixed gear bike (?) - then 165mm might be a good choice as you cannot level your cranks when you corner (the drivetrain will keep the cranks rotating) so 165mm might help you keep the cranks (pedals/shoes) from making contact with the ground.

    But that is just a very wild guess as you have not told us what you are planning to do with these cranks.[/quote]

    im planning in using them for a new belt buckle what you think..what color the belt is orange

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Sugino crank thread - RD, Comp, 75, Super Mighty cranks

Posted by Avatar for Stef @Stef

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