Chain Reaction World Champ Mtb Night Racing Series 2011

[BlueDogEvents]

WHERE: McLean's Forest Park, Christchurch
(due to Bottle Lake being closed, rather than have no World Champs, we have been able to get permission to race at McLean's Forest Park outside of normal hours. Bottle Lake may reopen but due to rubble being dumped there for many months to come, access to some areas will be severely restricted).

DATES: May 4 / 11 / 18 / 25th and June 1 / 8 / 15 / 22

All mountain bikers are welcome to this series and the course is suitable for all levels of riders. This series is social and friendly, a great way to meet other mountain bikers plus it will keep you motivated to come out and ride over winter. Combined with the opportunity to race for a World Champ title this series is not to be missed!

The 2011 series kicks off in early May and will run for eight weeks. The first race will be a warm up race to allow riders to familiarize themselves with the course and racing in the dark, then the next seven races after this will make up the World Champ Series.

If you’re not able to compete in the series, you’re welcome to come out and just ride in any individual race.
For full race details go to: http://www.bluedogevents.co.nz

[swtchbckr]

Hey, out of interest, what ratios are people running Singlespeed on these races?

[neels]

Hey, out of interest, what ratios are people running Singlespeed on these races?

When I was night racing on the singlespeed I was running 36:16, but that was at bottle lake so included the climb up the hill.

And I'm quite slow.

[JohnSS1]

I run 40 : 18 on a 29er SS I think it takes a bit of experiementing to get what suits as what works for me might not work for others .Most use just over 2:1 out at McLeans.

[swtchbckr]

Thanks... i run a 38:18 on mine, was wondering whether i'd need it taller... i guess for the accelleration out of corners you'd want it lowish, vs not spinning out too much on the straights. Any ideas on what Ollie Whalley or the other top guys run? surely they must be on something like 40:16 or something to have such fast times, or are they totally peaking out in the revs on the straightaways?

actually, come to think of it, 40:18 (on a 29r) would be something like 40 or 42:16 on a 26inch bike wouldnt it???

[stealth mode]

actually, come to think of it, 40:18 (on a 29r) would be something like 40 or 42:16 on a 26inch bike wouldnt it???

http://www.sheldonbrown.com/gears/

[neels]

i guess for the accelleration out of corners you'd want it lowish, vs not spinning out too much on the straights.

That was always my problem, watching everyone ride away in a mad sprint from the start while spinning out and then catching them in the singletrack when they ran out of puff and not being able to pass. Mcleans probably not as bad for that as bottle lake, it was mainly on the sealed road at the start that the lack of gearing showed up, and I did find that I could run one tooth smaller on the rear at mcleans than at bottle lake.

Can't give you any numbers but I know from looking around that the fast guys have some awfully big front rings matched with some awfully small rear cogs on some of the singlespeeds that my legs cringe at the mere thought of.

All of this is tempting me to go out to the garage and turn the bike back to a singlespeed for the night racing......

[swtchbckr]

actually, come to think of it, 40:18 (on a 29r) would be something like 40 or 42:16 on a 26inch bike wouldnt it???

http://www.sheldonbrown.com/gears/

says 40:18 29r ~=38:16 on a 26... yikes, 42:16 would be too tall for me out there... thats my SS townie ratio

[6Bikes]

Im running 42:17 on 700x30 cross tyres with 170mm cranks giving for the worlds which gives good acceleration but i spin out a bit on the double track. I am going to experiment with 16 on the rear but that may be pushing to much....