The plan comes together

Following the anticipation of my recent conversion of a Katakura Silk to a 650b road bike I was anxious to get all the bolts tightened down and get the bike out for a test ride. The afternoon being a model of wonderful Autumn weather, we loaded up and headed to the paths around Smithville Lake. Smithville Lake has one long and continuous paved path around a portion of the lake’s perimeter that yields about 42 miles of moderately flat riding, there are branches of trail with loose gravel, and about a million miles of forested single track. Add to that the low trafficked and hilly roads, and you’ve got a pretty good choice of surfaces on which to conduct a shakedown ride.

As it turned out, our shakedown ride was a bit shorter than planned but I still managed to put in some mileage on both paved and gravel surfaces, with a couple of steep, but even climbs. (One thing I like to check out on a shakedown ride – but didn’t yesterday –  is how a bike handles on undulating climbs.)

I’m always very surprised and happy to ride upon high volume/low pressure tires that are supple and forgiving. I’ve ridden the Katakura Silk on 700c x 25 tires enough that I know what to expect when I get on the bike, so the difference is marked and profoundly startling. It’s truly a “magic carpet ride.” I guess I need to compare known times over a distance, much as I hate that sort of test, but I seldom feel as if I’m going fast on 650b tires. That characteristic is usually deceptive though, and normally I am surprised to discover there’s little or no difference in overall speed. Spin up may be slower and – oddly – pedal strokes on climbs seemed less responsive than I might have  otherwise imagined. But fit and comfort are impressive. I need to get out on the open road now to find out how “spirited” the ride feels when I kick things up a notch.

Moving off pavement and onto gravel was a different experience. The first few hundred yards of pathway had very deep and loose gravel, and the bike handling was squirmy. Steering was difficult as I sank into the gravel. Further along the path the surface changed to much gravel and the pack was harder; the bike handled admirably well on that section.  Riding off road briefly – not something I do a lot of – the bike handled the transition from gravel to bushwacking to pavement with little fanfare.

There’s plenty more ride testing to be done, and some fine tuning I want to make, but I’m happy this grand experiment has been largely successful. The Katakura Silk is now a more useful member of my bicycle family, a nice compliment to my primary rider, the Boulder Brevet, and to my early morning Raleigh International three-speed rider. It’s nice when a plan comes together.

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5 thoughts on “The plan comes together

  1. Mark says:

    The 650 version looks great, congrats on a successful conversion. I’ll be following to see how it feels on a longer ride.

  2. Paul Glassen says:

    From my experiments fitting larger volume tires on bikes I have had for some time, I think you have hit it on the head when you say, “now a more useful member of my bicycle family”. Are those 42mm tires on the Silk? On my Soma 650b I have only tried the Soma 38mms that Boulder supplied with the build kit.

    What make is the saddle bag? Carradice? Or?

    • I’m running 38’s on the Silk. Just “eyeballing” it, I don’t think a 42 would fit in the space unless I re-dished the wheel or respaced the axel…even then it would be a pretty tight fit, so I’m good with 38mm. The bag is an Acorn.

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