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EdwardZ

Member since Jan 2013 • Last active Aug 2017
  • 1 conversations
  • 1,126 comments

Most recent activity

  • in Bikes & Bits
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    wondering if black felt-tipping them first will affect the glue

    Old school markers contained toluene or other solvents that could effect the cement bond between basetape and tyre. This is your main concern and the limiting factor of the tyre-rim bond.

  • in Mechanics & Fixin'
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    Which brand / manufacturer produce the absolute top end sealed pedal bearings? I would also prefer to source from UK manufacturer.

    Top-end and sealed don't combine. Which bearings fit your pedal depends, of course, on the pedal model. Since I assume you have cartridge bearings I'll talk about them-- with cup and cone you just purchase good quality balls from the same lot. Highest performance are typically shielded-- or even fully unsealed. The "Gold Standard" are high grade ceramics-- cheap, inexpensive ceramic cartridges tend to be inferior to similarly priced steel bearings-- but they are also quite expensive and not really of use beyond placebo. Speedplay uses 686 (13x6x5mm) outer and 137 inner (13x7x4mm). These are industrial products and best purchased from an industrial bearing supply-- where the bicycle companies also source them. SKF (Swedish) and EZO (Japanese) are quite well known and established makers but there are a number of other suppliers such as Schaeffler Group (FAG and INA) in Germany that also produce extremely high quality and well regarded bearings.

  • in General
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    Lyft-- recall GM funding ($500M investment in 2016 which amounts to around 1/4 of the total money they have raised) for just this purpose-- has now launched Level5:
    https://techcrunch.com/2017/07/21/lyft-l­aunches-a-new-self-driving-division-call­ed-level-5-will-develop-its-own-self-dri­ving-system/

  • in Bikes & Bits
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    I can't tell the difference between the red and yellow cleats, and the yellow cleats seem to work fine

    I have the (previous) pro-peleton version and assume them to use more or less the same mechanism-- despite different manufacturing and the resulting aesthetics. The pro cleats were the basic yellow with just the addition of the thin steel carbon sole protector. When the new pave version came out I asked Speedplay if there was a difference between the red and yellow and their response was

    "Thank you for contacting Speedplay.
    There is a difference in cleats.
    You can use a Pave cleat with Zero Pedals, but not Zero cleats with Pave pedals.
    Any further questions please feel free to contact us again.
    "

    Since I don't have any red-cleats I can't comment on the differences but might suspect that the red might have a slightly different C-ring.

  • in General
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    The theme of the "end of the motorcar" can be found in newspapers and magazines across the planet. The motorcar is, in fact, doomed. The first step will, of course, be killing diesel. Already now many cities are planning to disallow them-- including in Germany (alone in Stuttgart, home to Daimler-Benz, over 70000 cars will be effected in 2018). Given most motorcars sold-- prior to the scandals-- in Europe were diesel ...
    Now throw in the observation cars have increasingly lost their status value among young people and ...

  • in Bikes & Bits
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    Sealant to go? Mariposa Caffelatex comes in 60ml pouches. A single tubular takes around 30ml so it is sufficient for two tyres. The big bottles are cheaper but probably less economical. Conti Revo is quite similar and much cheaper but comes in larger bottle (smallest is 240ml) so need to portion out. Probably could fill into 30ml syringes-- available from your favorite chemist-- for the road...

  • in Bikes & Bits
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    Rather than the pressurised sealant cans, has anyone had success taking a bottle of something like Tufo extreme with them and adding in to the tub on the roadside after a puncture ?

    I used to sometimes carry a hypodermic syringe filled with latex milk. It did save the day on a few occassions as an emergency fix but was a bit messy. Mariposa now has a product called "Zot" that works in concert with their Cafélatex-- looks at least on paper a whole lot better and should suffer less from aging (latex emulsions needs to be fresh).

  • in Bikes & Bits
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    Not true sealant works even better with latex tubes but the sealant can cause the tube to stick together if left flat.

    That is the case with latex based sealants-- the ammonia used as an anti-coagulant evaporates. This should be less of a problem with Mariposa Caffélatex or Conti-Revo.

  • in Bikes & Bits
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    Or does 25mm tend to be a true 25mm?

    Tubulars tend, on the whole, to be pretty true to width. Depending upon construction their height, however, can differ a bit. Recall the shape of the tyre, in contrast to clinchers, is immutable to rim design. Tubular tyres are round. Given variation in roundness, etc. I'd avoid overly tight fits. Most frames, however, will accommodate 25mm tubulars. Some bicycles might have problems fitting Clement Campionato del Mondo (28mm) but they've been out of production for more than 30 years..

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