ZOX 20 Recumbent Cycling
On this page;
Also see my other page: Zox20 diary
>> (buying it and changes I've made)
What is a ZOX 20 Z-frame ?
ZOX are a
range of recumbent bikes
designed in Germany by Sergio Gomez. I guess the name derives from the
nominal wheel size 20x20 looking a bit like ZOX 20. The model I have
is the Z-frame Lowracer (Ultratieflieger).
- low seat height (9.8inch / 25cm) for improved aerodynamics
- square section frame tubing for increased knee clearance (compared with a similar spec. round tube)
- small wheels (20inch / 406) - useful for lowracer designs, no consensus about the
effect on rolling resistance
- front wheel drive, fixed bottom bracket, twist chain
- seat is not as laid back as many lowracers, hence more suitable for on-road
Pros and Cons
(Bear in mind that I would not consider myself an experienced recumbent
rider yet; less then 2000miles / 3200km so far)
- Great fun to ride :-))
- Very solid feeling frame, rigid. No apparent pedal flex.
- Feels fast, responsive - feels like it wants to go !!
- Handling at speed - good even at 45mph / 72kph (after which I put the brakes on !!)
- The chain drive to the front wheel does not adversely affect the handling, nor does
it noticeably limit the turning circle in practise.
- Better knee clearance than the
Quantum Toxy XR
(the only other Lowracer I have tried.) (for me)
- Great fun to ride :-))
- Close heel clearance on derailleur (for me).
- If recumbents attract attention then a Lowracer even more so (some may consider
this a Plus but I do not !!).
- On the rear suspended model there is no protection against water entering
the main frame tube.
- Minor point: no cable guides for the rear brake but zip-ties work fine for me.
(Supplied by Zox Bikes: frame, forks, chain rollers, handlebars:
other components from my PDQ or from LBS etc.)
- Frame and Forks: ZOX 20 Lowracer ("Tieflieger" in German).
Black, nominal size: small. Square section steel tubing, 40mm / 15.7inch.
(I read somewhere that the frames are built by
(they are based close to ZOX Bikes and also use square section tubing)).
- Chain rollers: Drive-side: 13cm / 5.1inch diameter. Return-side: 8cm / 3.1inch
diameter. I think they are made by
- Suspension: Rear swing-arm. Elastomer. I estimate 4cm / 1.6inch
of travel at the wheel hub (absorbs the worst of the road shocks).
- Seat: Plywood (11mm / 0.43inch thick) with closed-foam top
(19mm / 0.75inch thick) and ventilation holes, all black. Made by Flux.
- Wheels: Sachs hubs and ZAC 4019 rims.
- Tyres: Primo
Comet (37-406), later replaced by Conti Top Touring and then Marathon
- Chainset: no-name, black, 46 teeth, later replaced by 48
teeth (different make) with a smaller Q-factor, then with Thorn short 140mm cranks, 40/28 from
- Gears: Sachs (now SRAM) 3x7 (3
speed hub gear (+36%, DD, -27%) with 7 speed cassette (12 to 28 teeth), later 13 to 21 teeth).
- Gear range: (orig.) 24 to 104 inches (good range for my
fast (for me) day rides)
- Handlebars: no-name, black, approx 45 degree sweepback.
- Stem: varies depending on setup - see Zox20 log (end up with PlanetX 50mm/10deg).
- Brakes: Tektro V-style.
- Luggage carrying: Later: NovoSport Sport Mini.
- Mirror: Busch & Müller Cyclestar (started with the
long-stalk model, later moved to the short-stalk model). (I hate
riding ANY bike without a mirror).
- Early warning devices: Small bell (a polite, standard
German accessory: in an emergency I shout).
- Weight: *approx* 15kg / 33lbs (orig. build, no tailbox).
- Speed: The favourite question of the onlooker: my stock answer is: depends on the rider :-)
ZOX Links / References
On my other ZOX pages
Other owners pages
Carlsen (Zox20 S Low Light owner from Denmark) photos and blog,
including build-up pictures and ideas on how to fit mudguards, front
light, kickstand. English spoken.
- Aragoata @ Flickr (nice pics, Terracycle roller mod, on the road shots,...)
- Bike Wiki (German)
- "Zox Owner" (Japanese page)
? (Japanese page: loads of good quality photos !!)
- Oliver Zechlin (ZOX-26 (?and ex ZOX-20) owner) (was www.liegerad.com, now redirects to ZOX bikes).
(he also produces the excellent bi-annual HPV CD-ROM containing
vast quantities over photos, videos, websites etc.) English spoken.
- Mike Fuchs
(German ZOX 20 owner, and ex Flux V220 owner)
- Reinhard Herden
(19/10/09: site gone) German ZOX owner (including interesting specifications/modifications
to make it a fast touring bike, including Rohloff, SON hub dynamo,
disk brakes, rear rake, sidestand...)
- Claus BRAtvogel
(his capitalisation, not mine!) (German ZOX tandem owner, loads of ZOX tandem pictures)
including a ZOX triplet (pedalling child in the middle position) !!
- Zox 20
Low German owner, including pics of homemade foam tailboxes, aluminium seat support and 1 piece carbon handlebar/stem with HOWTOs.
- If you know of any others please email me
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