Thought of the Month

Featured

Tires and Tubes – what matters & what doesn’t? Part 3

Link to Part 1 of this series

Link to Part 2 of this series

Hard to believe, but it’s been over a year since I started this little experiment.  (now Dec 2012, was Sept 2011)  I got lazy, frankly, and just didn’t update my report.  But here is my synopsis, finally!

Essentially I went through an informal, mostly-unscientific comparison of three different high-end tires:  Continental Grand Prix 4000s, Vittoria Open Corsa Evo CX 320 and Michelin Pro4 Service Course.  At the time I had convinced myself that the Vittoria latex tubes were the best way to go, so I didn’t change those out.  More on that later, however.  I also kept the tire size of each model at 700 x 25mm.  (larger than the standard 700 x 23mm)  So, effectively, I only changed one variable each time!  (somewhat scientific, right?)

In an attempt to be even more scientific, I actually kept track of the mileage I got out of each of the sets of tires.  Remember, though, this is a sample of one of each (well, two if you count both the front and back tires), and it was a very uncontrolled environment. (i.e. who knows when the next thorn or nail is out to get you!  You may ride for months without a thorn, then get 3 or 4 in the next 3 or 4 rides.  You can’t generally blame that on the tire!), So, the results are not completely conclusive.  Still, however, I think I have learned enough to effectively tell general characteristics about how each tire wears and holds up to thorns and other sharp objects.

Continental GP4000s (price paid – on eBay, $95/pair with shipping)

As mentioned in Part 1, these are the most popular high-end tires in my area (Tucson, AZ), and were strongly recommended by a couple of my friends.  Therefore they were the first pair I tried when I upgraded from my “standard grade” tires.  I’ll have to admit, I did notice a difference – they felt smoother and faster than my regular tires.  It wasn’t a huge difference, but it was noticeable.  (If you go back to the first two parts of this series you’ll note that I changed from 700 x 23mm to 700 x 25mm, and I also went from butyl tubes to latex tubes.  So, it’s possible that either one of these changes was really responsible for the improved ride quality.)  Of the 3 brands and models tested, the Continentals lasted the longest – 1764 miles – before I felt like it was time to dispose of them.  (Generally when tires get thin you start getting repeated flats, so you know it’s time to get a new set!)  Overall I was very impressed with these tires, and had to accept an “I told you so” from my friends, accordingly!

Vittoris Open Corsa Evo CX 320 (price paid – on eBay, $110/pair with shipping)

 

In several reviews I read, these were said to be the most plush-riding of all the tires on the market, and also had the lowest rolling resistance (i.e. they made you go faster with the same amount of energy!).  Many of the articles made comparisons to tubular tires (the kind that you glue on to the rim – the tube and the tire are one and the same), which are supposedly the nicest-riding tires you can buy.  They are much more expensive than traditional tube tires, and they require a special wheel, so I haven’t tried them yet.  More on tubulars some day…   So, given that these Vittorias seemingly had the best of both worlds – rode like tubulars, installed and wore like traditional tires –  naturally I had to try them!  And they did seem to ride extremely nice when I first switched from the Continentals.  Again, I wouldn’t say it was a huge difference – just ever so slightly smoother.  As for rolling resistance, I’d say that was about a wash.  (Maybe if I was a professional time-trialer, I might notice a difference, but I don’t think the average Joe would notice at all!)

As for durability, I could tell right away that they weren’t going to match the Continentals, since they were made of a lighter, thinner material.  (The Vittorias are 320 threads per inch, vs three layers of 110 threads per inch in the Continentals.  This is why they feel so “plush” – it’s like better sheets on your bed.  The higher the tpi, the plusher they feel.  But also the more quickly they wear and become susceptible to thorns.  …Despite all of that, they lasted rather well, turning in the second-highest mileage before I felt they were “done” – 1467 miles.  Overall I was also very impressed with these tires – they weren’t as durable as the Continentals, but they didn’t claim to be, either.  And they were very slightly quicker and smoother.

Michelin Pro4 Service Course (price paid – on eBay, $93 with shipping)

In at least a couple reviews I read while researching tires, they picked the Michelin Pro3 Race as their favorite all-around tire, due to its overall ride quality, excellent wear and ultra-low rolling resistance.  Therefore I had to include them in my little test.  Unfortunately, however, before I could buy a pair, Michelin replaced these with a new model, the Pro4, which came in both an “Endurance” and a “Service Course” model.  Since my goal was for ultimate ride quality and minimum rolling resistance, I went with the higher-performance but less-endurance Service Course model.  (I would later regret that choice, as you’ll see below)  Michelin claimed that the Pro4 was pretty much better in every way than the Pro3, so I figured I couldn’t go wrong.

Overall these tires were built more like the Vittorias than the Continentals – i.e. they were thin and light – so I knew they probably wouldn’t be very good in the endurance department.  But when I rode them, they didn’t seem as good as either of the other tires in ride quality or rolling resistance.  (Again, these are very subtle differences.)  So I wasn’t extremely impressed from the get-go.  But when they started getting flats very early into their life, I decided I didn’t like them at all!  They turned in the lowest mileage of the three tires by far – 609 miles – before I disgustedly threw them away and put a new set of Continentals back on the bike!

A word about tubes

As I mentioned, I continued to use the Vittoria latex tubes during all of these tests, primarily because several articles had convinced me that latex tubes were longer-lasting, since they were more flexible and therefore more resistant to thorns.  They were also claimed to give you lower rolling resistance, although I’m not sure how a tube can affect rolling resistance!  (Beware of snake oil claims!)  Their main drawback is cost – you can’t find in most shops, so I ordered them online, to the tune of around $13-15 each tube!  That’s double or triple what you’ll pay for a good butyl tube!  But to me it’s worth it if they really do offer more resistance to flats!

Closeup of a Vittoria latex tube

But the reality, I found, is somewhat the opposite.  Yes, they do offer more thorn resistance, since they can stretch and effectively prevent some thorns from puncturing a hole in the tube.  However, their flexibility is also their acchiles’ heal.  Very good tires, such as those above, tend to get small cuts and nicks in them from objects in the road.  With normal tubes this is not a huge deal, since the holes are too small for the tube to “bulge out” into the cut.  But with latex tubes, however, the tube will easily and quickly extrude itself into the hole such that a tiny portion of the tube is actually protruding from the outside of the tire!  (This is easily visible with latex tubes since they are pink!  You get a small pink “dot” on the outside of your tire.)  …So, as you might imagine, once you ride over the little dot of tube that is now outside your tire a few times, the tube explodes and you have a flat.  And if you try to replace the old tube with another latex tube you will just have another flat the same way, unless you plug up the hole!  (tire boots, dollar bills, pieces of old tire, etc are good for this – more on that in an upcoming article…)

So, the overall conclusion I finally came to, after finally figuring out what kept happening, is that latex tubes are NOT the way to go!  Just buy good quality butyl tubes from your local bike shop and you’ll be better off!

Tire tips

I actually learned a few things about tires during this little experiment.  Here are a couple tips, accordingly:

1) Most tires are directional – note the arrows on the sidewalls and make sure you install them so they rotate in the proper direction.  (I’m not sure what happens if you install them backwards – I believe you’re just going “against the grain”, so to speak, and not maximizing efficiency.  But maybe it will cause you to go back in time???)

2) Rotate your bike tires, just like your car tires.  Most of the weight – and therefore the wear – will be on your back tire.  So, to get maximum life out of your tire, rotate them at least once during their life – somewhere around 750-1000 miles.  If I would have learned this little trick earlier on, I’m convinced I could have stretched another 200-500 miles out of each of the sets!

Conclusions

So, in conclusion I would say that my friends were right – the Continental Grand Prix 4000s is the best overall, in terms of a comprise between light weight, cost, feel and endurance.  They will be my go-to tire until something better comes out.  The Vittoria Open Corsa Evo 320 tire is probably a tad better riding than the GP4000s, but it’s only equal or worse in all other categories.  (Note that it might perform better – i.e. last longer – with standard butyl tubes, so I might have to give them another try!)  I would recommend the Vittorias for anyone who needs that last bit of performance and/or ride quality and is willing to sacrifice a tad of durability, as well as pay a tad more.  …Finally, I would not recommend the Michelin Pro4 Service Course at all.  They were very thin, didn’t ride that well, and didn’t last at all.  Yuck!

I hope this helps with your tire choices – there definitely is a difference in tires, and it definitely pays to buy good tires.  Please let me know your experiences and/or recommendations!