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'Cross geometry and On-One Il Pompino SS 'cross questions...(2 posts)

'Cross geometry and On-One Il Pompino SS 'cross questions...SS_MB-7
Feb 6, 2002 5:31 AM
Hey,

I've been researching having a singlespeed-specific 'cross/fixed-gear frame built for commuting (fixed), training (fixed) and 'cross racing (free) and noticed the new On-One Il Pompino singlespeed frameset/fork:




Here's the product description:
"We bust our cred completely and we've made a ROAD FRAME. 'Cept it's not a reoad frame. It's the ultimate winter bike. The ideal commuting / Audax / hacking / courier bike, or just put simply "a nice bike for riding from A TO B" Designed for FIXED or SINGLESPEED use, with clearance for MASSIVE 700c tyres - we've fitted up to 38Cs with ease. Mudguard clearance, rack mounts, canti mounts, and it comes with a fork for the crazy price of only £225 all in!" -- that's about $318US, or $510CDN. Not bad for a frame and fork....granted, it is butted 4130 chromoly.

Here's more info on the Il Pompino: http://www.on-one.co.uk/products/ilpompino.shtml

Based on the top tube length and standover, I'd be on a 51cm. Here are the specs:
seat tube = 51cm (c-t); 45cm (c-c)
top tube = 54.1cm (c-c);
head angle = 73.0;
seat angle = 73.5;
chainstay length = 40.5cm;
wheelbase = 97.3cm;
BB drop = 6.6cm;
stand over = 74.9cm

In comparing the above specs with other 'cross builders frame specs, it is immediately obvious that the head tube angle is at least 0.5 degrees steeper (compared to the Seven Tsunami), 1.0 degree steeper (Surly Crosscheck and Soma Double Cross) or 1.5 degrees steeper (compared to the Kona J-t-S, IF Planet Cross and Steelman Eurocross).

In comparing it against the Seven Tsunami, the seat tube angles are identical (73.5), as are the BB drops (~6.6cm). The chainstay lengths and wheelbase can't really be compared since this is a singlespeed frame and the wheel is constantly moving in the horizontal dropout to adjust the chain tension.

How would this bike be for 'cross racing?

Ride Hard,
Mike B.
re: 'Cross geometry and On-One Il Pompino SS 'cross questions...gemza
Sep 13, 2002 9:28 PM
mike did you ever get this bike?
John