PROPULSION IS POSSIBLE
The Zipp Sub-9 Disc Tubular Bicycle Wheel’s highlights so far include a pair of
Ironman® 70.3 World Championships, a Tour de France® yellow jersey and some of
the fastest Ironman®-distance bike splits ever recorded. Zipp expected nothing
less from the ultimate aerodynamic breakthrough.
In the center of the aero “sweet spot” – a wind angle of 12 to 18 degrees – the
Zipp Sub-9 Disc Tubular Rear Bicycle Wheel was the first wheel ever to produce
forward lift, when paired with Zipp’s 21 mm Tangente tire. To achieve this feat,
Zipp added a toroidal bulge similar to their spoked rims around the edge of the
disc to control airflow at the wheel’s leading and trailing edges. In addition
to improving aero performance, the bulge’s vertical compliance keeps the Sub-9
glued to the road when cornering and yields a comfortable ride, hour after hour.
This makes it the ideal choice for long-course triathletes to bounce out of
Transition 2 for the run with fresh legs after a blistering bike split.
For decades, an obsession with aerodynamics has influenced everything from
wheels to water bottles. But with the Sub-9 disc, Zipp moved from minimizing
drag to maximizing propulsion.
Recommended and approved
These brake pads have been tested and approved by Zipp for use with their
tubular and all carbon clinchers. Failure to comply with these recommendations
could negate your warranty.
Tangente Platinum Pro
Zipp Tangente cork pads
Bontrager cork pads
Zipp carbon/carbon pads
SwissStop yellow pads
With the new Firecrest rim shape in Zipp’s 404 and 808 Tubulars and Carbon
Clinchers, Zipp wheels make a bigger difference in more ways than ever. Not only
is Firecrest more aerodynamic than any other rim design, it improves handling in
crosswinds, wheel strength, and overall ride quality.
Boundary Layer Control) - Advanced Boundary Layer Control (ABLC) refers to
the patented and instantly recognizable dimpled pattern found on most Zipp rims.
ABLC smoothes airflow across the rim's surface and is tailored to every model
from the 202 to the Sub9 disc. 2009 sees the third-generation of ABLC, with up
to 4 times more dimples than before.
Constrained Layer Control) - Visco-Elastic Constrained Layer Control (VCLC)
uses a vibration-absorbing material sandwiched between layers of rigid carbon
laminate in the rim. When the wheel receives an impact from the road, much of
the shock is absorbed by the VCLC system, delivering a 10% reduction in
- Carbon Bridge uses a Kevlar® thread in a co-axial helix stitch to bind sheets
of carbon to each other in Zipp’s tubular rims. Because Kevlar is 350% more
impact resistant than carbon, it can disperse shock more evenly throughout the
carbon laminate, making for a rim that is practically bulletproof. In
particular, Carbon Bridge reduces the vulnerability of the rim's tire bed, the
area most susceptible to damage from impact.
88/188 Hub Technology -
Every aspect of Zipp’s 88 and 188 hubs sets a new benchmark. The standard steel
bearings are the roundest in the industry. The 17mm axle is the stiffest of any
road hub they've tested. The wire EDM-cut hub internals are the most precise.
The SHIFT spoke hole technology is the most durable. When it comes to precision
and performance, there's really no comparison.
Hub Used -
188 disc hub
Brake Track Width (center)
Ceramic Bearing –
Note: The Sub-9 may present
some fitment issues for a small number of frames. The clearance between the
chainstay and the rim may not be adequate to avoid contact between each other
when ridden under load. We urge customers who plan on riding the Sub-9 to test
the wheel within a frame under riding roads and conditions before purchasing.
Clearance within individual frames of the same size, from the same manufacturer,
may vary. Customers who run into this fitment issue may consider Zipp’s Super-9
or 900 discs as alternatives. Frame known to have fitment issues are: Cervelo®
P3, P4, Ridley® Dean and Noah, Scott® Plasma, Giant® Trinity Alliance, Argon®