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  1. #1
    The Legitimiser Sammyboy's Avatar
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    My modified, race ready Downtube IXFS

    I have the latest Downtube 9 FS as my demonstrator now, and with Smithfield Nocturne looming, I decided it was time for some mods to my older IXFS. I'd already fitted a Brooks B17 Champion, but I had more in mind. For this round of mods, I replaced the original bars with some older drops (older drops in this country had the same clamp diameter as is now used for MTB bars, so they fit), got some suitable levers for the V brakes, and fitted an old Suntour bar end shifter I had. Finished it off with Velo Orange elkhide bar wrap to match the seat. I find the standard gearing too low; I seldom use, and never need anything below about 4th, maybe 3rd, and find I spin out too easily on downhills, so I fitted a 52t chainring I had laying around, and also put some Marathons on, the 1 1/2 inch ones which are rated to 100 psi. Only a couple of issues; somehow I used a different stitch on each side of the tape, and I realized part way through the process that I'd actually got the levers on the wrong sides; no biggie really. Secondly, I should really have fitted the old 105 cranks I have around, as the torque a guy my size can put on a 52t chainring in the highest gear flexes and bends the spider on the standard cranks (never had any trouble with them in the standard guise).

    That aside, it's wonderful. Gives me a more aero riding positions on the hoods, without being too low, and then the hooks get me right out of the wind. Of course, the adjustable stem means I can be even more aero if I choose. The gearing feels great, flexing aside, and the bar end shifter, despite being designed and manufactured in the 5 speed era, shifts right across the 9 speeds no problem. Do I have the handsomest IXFS now, or what?






  2. #2
    Senior Member stevegor's Avatar
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    Ah, the obligatory white garage door with a bike photo.....

    Sammyboy, that bike looks GREAT!!

    I'm sure you will do fine in the race and if you don't win you should get a prize for the most classy mod. Maybe change those pedals for SPDs or roadies IMHO.
    Hopefully you've inspired some folder fanatics to try drops instead of flatbars when they're modding their bikes.



    Could you tell me the brand and model of the levers you're using with those Vbrakes, as I'm thinking of converting one of my R20s to Vbrakes, I have a set of travel agents for this job, but......

  3. #3
    Part-time epistemologist invisiblehand's Avatar
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    Nice job!


  4. #4
    Pedaling fool ShinyBiker's Avatar
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    Sweet!

    When the stock kenda kwests wear out on my DT 8FS, I'd like to go with 100psi tires. What's the ride like on yours vs. the stock ones?

  5. #5
    Senior Member caotropheus's Avatar
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    Quote Originally Posted by stevegor View Post
    Could you tell me the brand and model of the levers you're using with those Vbrakes, as I'm thinking of converting one of my R20s to Vbrakes, I have a set of travel agents for this job, but......
    http://aebike.com/page.cfm?PageID=30...d=11784&type=T

  6. #6
    The Legitimiser Sammyboy's Avatar
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    It is indeed the Tektro levers I used. The tyres are great, roll much easier than the Kendas and feel faster. On very bumpy surfaces at speed, I found the rear of the bike a little unsettled and skittery, so I may end up running them at 80 more. Time will tell.

  7. #7
    JustFoldIt ChainlessRev's Avatar
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    Very nice Sammyboy! Thanks for sharing.
    Abio Bikes - Chainless Folding Bikes
    http://AbioBikes.com

  8. #8
    Senior Member
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    Very nice, Sammyboy!

    I was quite tempted by the Downtube FS and thinking of doing something similar (until a deal on a Birdy popped up on eBay). Nice to see the result of my thought experiment though!
    ICE B1, Brompton H6, Schwinn Mirada drop-bar vintage mtb

  9. #9
    Senior Member
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    PS - what does it feel like, performance-wise? In my thought experiment, I was going to use Schwalbe Stelvios which are working very well on the Birdy, rather than the heavier Marathons. So far they've stood up to abuse far better than I'd imagined. Zero visits from the p*nct*re fairy
    ICE B1, Brompton H6, Schwinn Mirada drop-bar vintage mtb

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