The chip seal in NZ sucks. Go 90.

Agreed. Keep the pressure on the low side for your weight.

How much do you weigh?

I'd agree with this unless you're a really big unit. The road isn't as bad as it used to be - town is fine, and a lot of the road out to Reparoa (the turnaround) was resurfaced just in time for the race last year. It's a hell of a lot better than the roads where I live a few hours south of Taupo. I'm not racing this year due to a new baby - have an awesome day, and make sure you bring gear for all weathers!

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Will be probably 80/81 with cycling gear on

80/81 what?

KGs.

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What pressure do you normally use?
90-100psi is more than enough on 25mm tyres at that weight regardless of the road surface.
Also what's your internal rim width.
I generally ride either 25mm Continental GP4000s on 19mm wide Swiss-Side rims on the tri bike or 25mm Michelin Pro4 SC on 15mm Mavic rims on the road bike. I use similar pressures on both and those pressures are usually:
rear wheel = 90psi to 100psi
front wheel = 80psi to 85psi.

I ran close to this there last year. Believe I went 85 in the rear and 80 up front. I weigh 75kg.

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-Brad Williams
Website | Twitter: @BW_Tri |Instagram: @BW_Tri | Strava | Co-Founder & Coach at: KIS Coaching
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I'm running Vittoria Evo CXII tubulars on Hed Stinger wheels (the wide rims), 23mm front 25mm rear. I weigh 71kg what would you recommend for my pressure? I was going to run 95 rear 90 front

Not well versed in Tubulars, so not sure if it is different for them. But if they were clinchers and with your weight I would run close to what I recommended above, if not a little less.

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-Brad Williams
Website | Twitter: @BW_Tri |Instagram: @BW_Tri | Strava | Co-Founder & Coach at: KIS Coaching
Partnered with: Zoot Sports | Precision Fuel &Hydration | ISM

I'd go with 80-90psi as the roads are pretty rough and while I'm not a serious data geek there is some evidence that states the benefits of comfort you'll gain out weigh the friction caused by surface area in contact with the road. If I were you I'd also go with 25mm up front and 25mm (28mm if you can) in the rear tyres. That way you could easily run around 80-90psi as they do in the Paris Roubaix.

No kidding. The year I did IMNZ it was 3C and foggy at race start. I froze for the first lap of the bike.
By the time I was only my final lap of the run it was 27C and I was getting a sunburn.

x2...make that x1000...

I raced there a couple years ago and I didn't find the roads to be that bad. Switching over to latex tubes for race day also seems to soften the feel of the road, so the chip seal didn't bother me that much.

 
Pissed down for 2 days straight - lake is cooling nicely.

;)

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Where I live, the new chipseal is the worst! The older stuff gradually gets worn down.

If it's rough chipseal, 25c GP4000 and 180 lb full up weight, I think 80 psi would suffice. Maybe less if there aren't potholes and rocks to worry about.

I have switched tubes as well so we'll see how that goes!

I'm using 19mm rims so might go something along the lines you use. Thanks

Great thanks for the advice

Bah. It was lovely in Kinloch last weekend. Just about right.

Is Taupo generally a slow lake to swim in, or is it just me - I always seem to go faster in the Blue Lake in Rotorua.

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Swim. Overbike. Walk.

The roads at IMNZ are freaking horrible.

Whatever you ride on race day (on your 25mm's) ride 10-20 PSI less.

Before race day, don't to an easy ride along the waterfront, ride up the Napier/Taupo hill. Know it, or you will be in the big ring and go "Oh FK" and be stuck at 40RPM for 5 minutes.

also, if you can, get a ride to the race track. Ride 20km out and 20km back. You need to know that hill in both directions, and also the crappy road for a while. That will convince you to ride 10-20 PSI lower than normal.

You will see speeds lower than you're used to, but don't worry. If you ride hard on hard tires, you bike split will be ok, but your legs will be fried from all the vibration. Give up a couple of minutes on the bike so you can actually run the marathon, without crying for your mommy.

On 25's you're probably good with 90-95 PSI

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TriDork

"Happiness is a myth. All you can hope for is to get laid once in a while, drunk once in a while and to eat chocolate every day"

Also didn't find the roads bad at all last year.

Rode 9min faster at Taupo than Kona so conditions dependant it really isn't that bad.

In saying that 90psi was about the mark I went with in both wheels. Enve 8.9 with 23 Continental gp4000IIS

 
It's dropped since last weekend, 2 days of cold weather & rain will do that.

How are you gauging 'faster' between the two? Just on feel? I often think its like riding a bike in the dark - you always feel like you're going faster. Blue Lake is the same, you can't see a thing compared to seeing the bottom the whole way in Taupo.

SB.

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