Strava Club Winner


We established the Cell Bikes STRAVA club to encourage and reward people with their inspirational efforts and support for great causes.

Congrats to George Mihailides who is doing both, and his attempt to climb the height of Mount Everest in a single bike ride by going up and down the same hill repeatedly until he’s ascended 8848 meters.

George, please email me at (mark@cellbikes.com.au) to claim your reward!



Last Weeks Leaders


George Mihailides

George Mihailides 
On Saturday May 24, 2014 I will be attempting an Everesting.

Basically this means I will be trying to climb the height of Mount Everest in a single ride by going up and down the same hill repeatedly until I’ve ascended 8848 meters (if you are curious to learn more about Everesting, you can go here: http://www.everesting.cc/).

I have decided to dedicate this ride to the street people of Australia and have established a charity in support of Swags for the Homeless.

Unfortunately we live in a world in which some people literally have to sleep on the street every night.

If you work in and around the city centre, you’ll know whom I’m talking about. They are the folk in raggedy filthy clothing carting around a worn out piece of luggage that contains all their worldly possessions. They are the folk whom we pretend don’t exist; whom we often callously
ignore and say to ourselves that they only have themselves to blame.

All I can say to that is, there but for the grace of a higher power goes me. I was once very nearly one of them.  It could be you one day.

Any amount of suffering I endure on Saturday pales in comparison to the circumstances of these people. So I ask, if you have the capacity and can find the generosity of spirit, please donate to Swags for the Homeless by following this link:

In return, I thank you, sincerely, and hereby commit to giving my best on Saturday.

All donations will go directly to the charity (i.e. not to me personally) and amounts above $2.00 can be kept out of Joe Hockey’s fat and growing coffers.

For anyone wishing to provide moral support on Saturday, I will be attempting to climb this segment 253 times:

It will be a 255KM journey which I hope to complete inside of 18 hours commencing 5:00AM.

You will be most welcome but to be honest, I would much rather you donate to my chosen cause.

I will post a ride report next week.

Thanks for reading.

Continental Grand Prix 4000S vs Vittoria Rubino Pro — which is best? (Blog Review by REX)

Continental Grand Prix 4000S vs Vittoria Rubino Pro — which is best?

Which rubber to ride on your bicycle is a very subjective choice. Vittoria Rubino Pros have been a long time favourite bike tyre of mine. I recently put a set of Continental Grand Prix 4000s tyres on my Wabi Special bicycle. This article is my subjective comparison.

Following is a quick snapshot of the differences between the bike tyres.

Continental Grand Prix 4000S Vittoria Rubino Pro
Manufacturer summary Top choice of serious race bike specialists all over the world, and has been for many years. High mileage tyre designed for long service life; the perfect all rounder.
Weight (claimed) 205 g 225 g
Pressure 110 psi (recommended), 120 psi (max) 100-145 psi
Threads per inch 330 TPI 150 TPI
Price (A$ Cell, 16/5/14) $58.99 $41.14

It is perhaps a little unfair to make a comparison as to these two bicycle tyres: the Vittoria Rubino Pro is marketed as an all-rounder; the Continental GP4000S is marketed as a race tyre. Nonetheless, that is what I am going to do. A fairer comparison is possibly the Vittoria Diamante Pro vs the Continental GP4000S; or the Vittoria Rubino Pro vs the Continental Gatorskin.

Vittoria Rubino Pro

Vittoria Rubino Pros have been my reliable bicycle riding partner for more than 7,000 km; probably closer to 10,000 km actually. I have had one 700 x 25C tyre, and five 700 x 23C tyres on three different bikes, including a multi-gear Fuji Absolute 3.0 flat bar road bike running a Fulcrum Racing 5 road wheelset, and two Cell Bikes fixie/singlespeeds, one of which runs Halo Aerorage track wheels. I have only worn out one tyre; the rest are still in use. I have only had one puncture when a shard of glass penetrated the rear tyre.

Vittoria Rubino Pros sound and feel fast. They roll really easily, and I have completed two Brisbane to the Gold Coast charity cycle rides on them — 100 km averaging more than 30 km/h.

As the tyres get to more than 30 km/h, they begin to get a high speed tyre sound — it is a nice aural accompaniment that makes me feel like I am riding fast.

Around corners, I do not get inspired by their grip — in fact, I am somewhat tentative around corners on these tyres.

The outstanding feature about these tyres is how long they last. When tyres last this long, why skimp on cheap rubber?

Vittoria Rubino Pro on my Cell Bikes fixie/singlespeed
Vittoria Rubino Pro on my Cell Bikes fixie/singlespeed

Continental Grand Prix 4000S

When asking my bike riding buddies about tyres, Continental GP4000S tyres are always popular. When I got my Wabi Special, I decided to try them out. (Note that there is a newer version of this tyre, the Continental GP4000S II).

The Continental GP4000S are almost silent in comparison to the Vittoria Rubino Pros. The give very little feedback in a straight line as to how fast you are going — they just get on with their business quietly and efficiently. While their lack of feedback makes them feel almost wooden, I think that the reality is the reverse, they are a very fast rolling tyre.

When I initially fitted the tyres, they appeared to be coated in a tacky silicone compound similar to that found on new motorcycle tyres. As with new motorcycle tyres, they need to be used for a few rides before this coating scrubs off. During this time, the tyres felt squirrely; not actually losing traction, but feeling as if they might. With the coating scrubbed off, the tyres are confidence inspiring. Around corners, the GP4000S emits the sound of rubber clawing at the road. The tyres inspire confidence with aural feedback as to what the tyres are doing.

I have only done about 500 km on these tyres so far, so I can not comment on longevity. Needless to say, I have not yet had any punctures.

Continental GP4000S on my Wabi SpecialContinental GP4000S on my Wabi Special
Continental GP4000S on my Wabi SpecialContinental GP4000S on my Wabi Special

So which tyre is best?

They are both great bike tyres, but excel at different things.

Having ridden the Continental GP4000S, I can see why amateur bicycle racers love it. The tyre is fast in a straight line and grips like glue in the corners. A great combination for outright speed freaks!

The Vittoria Rubino Pro has been my trusted training companion for many years, and will continue to be so. The tyre has low rolling resistance in a straight line, high puncture resistance and seems to last forever. A great go-to tyre for most uses!