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Rollout and Gearing for 38 year old novice  RSS Feed

#1 2017-10-12 11:23am

Lukie36
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From: Seattle
Registered: 2014-11-24
Posts: 141
Bikes: 4

Rollout and Gearing for 38 year old novice

I just bought another bike and it is currently set up with 50t rennen chainring and 18t cog. I haven't seen this configuration before though the rollout is really similar to my current setup on my Haro Blackout. 44t and 16t. I am just starting out in racing so I am just trying to get things figured out. Any advantages or disadvantages to running either one? Recommendations?

The bike isn't together, otherwise I could test it out. Any help would be greatly appreciated.

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#2 2017-10-12 1:03pm

Garcia_58
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From: South FLA
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Re: Rollout and Gearing for 38 year old novice

I have been told that running a larger cog requires less torque, but I think it is an itty bitty amount.  Find out what your competitors are running and start from there.


I am not of this world ----- 1978 GLJ 1979 DG Racer

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#3 2017-10-12 4:36pm

MickRich393
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From: Kanagawa, Japan
Registered: 2010-08-29
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Re: Rollout and Gearing for 38 year old novice

Wow, haven't heard of or seen a 50/18 ratio before! I'm just about to try a 47/17, which is a slightly higher gearing than a 44/16.

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#4 2017-10-12 5:20pm

knightindullarmor
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From: Littleton colorado
Registered: 2009-03-31
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Re: Rollout and Gearing for 38 year old novice

I run a higher gear ratio (52/19) on one of my cruisers just to keep up with the road bike crowd in colorado.  You would be slow out the gate for racing application but the top end speed is untouchable when you get turning and burning.  Hills can be a bit of a grind so I have 185s for my cranks.
If you are racing a good thing to do is go to your local track ask the guys who are flying what they are running and start there.

Last edited by knightindullarmor (2017-10-12 6:17pm)


Things im looking for:  AUBURN BARS, 2014 GT SPEED SERIES CARBON, GT SPEED SERIES 24 DECAL (RECALL VERSION),  GT ALUMINUM SERIES XL DECALS, SPIN THUG RIMS, CLEM TWIN CRANKS/HUBS,  FISHBONE KONG FU OR NINJA, GT HE MAN PEDALS, DUAL SIDE DRIVE HUB (LHD/RHD)

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#5 2017-10-12 5:49pm

Thrash
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From: Portland, OR
Registered: 2006-03-21
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Re: Rollout and Gearing for 38 year old novice

pros , you make slight tweek to rollout with the front sprocket to give itty bit easier or harder. where on smaller drivetrains the rollout change would be greater by changing a tooth.
Cons, weight larger gears weigh more . . also off chance that lager gear up front is easier to damage. also larger gears are less common to find replacement for.


It's nice to be important but its more important to be nice.
current race rigs:
2012 Yess Pro xxl
2013 Chase 24 xl+

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#6 2017-10-13 12:42pm

Garcia_58
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From: South FLA
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Re: Rollout and Gearing for 38 year old novice

Thrash wrote:

pros , you make slight tweek to rollout with the front sprocket to give itty bit easier or harder. where on smaller drivetrains the rollout change would be greater by changing a tooth.
Cons, weight larger gears weigh more . . also off chance that lager gear up front is easier to damage. also larger gears are less common to find replacement for.

Whoa!

Thanks


I am not of this world ----- 1978 GLJ 1979 DG Racer

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#7 2017-10-24 8:00am

VanPelt408
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From: TX
Registered: 2011-01-21
Posts: 436

Re: Rollout and Gearing for 38 year old novice

comparing rollout is not comparing gear ratios.  the gear ratio is one of the variables with tire inflated O.D. being the other.  different manufacturers have varying O.D. for the same "size" tire.  use a rollout calculator like the one on bmxultra.com to compare.

A general starting point is between 54" and 55".  My class bike is 54.78" and my cruiser is 54.70". 

I recently changed from 54.28" on class and 54.44" on cruiser.  I like the new rollouts and I don't feel like I'm "spinning" as much now.

Jon.


Mine:  2015 Ssquared V2 Pro XL (41-45 Inter)
          2017 Ssquared V2 ProXL 24
Son's: 2015 Ssquared V2 Pro (15 Inter)

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#8 2017-10-24 10:36am

Garcia_58
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From: South FLA
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Re: Rollout and Gearing for 38 year old novice

Sounds like a harder gear, great for most older dudes, like me. tongue


I am not of this world ----- 1978 GLJ 1979 DG Racer

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