[Spyrious]

Ok.I’m constantly reading and searching info.I’m definitely considering the 29″ option.Using this calculator

http://gears.mtbcrosscountry.com/#26I1I1

I found out that on a 29er you have to put more effort (comparing same gears on a 27.5 and a 29),because of the larger wheels (perimeter,not weight).

for example a 27.5 bike with a 34 chainring and 50t largest cog has a ratio of 0.71.

A 29er with the same gears has a ratio of 0.74.

My current bike has a ratio of 0.61.What is your input?Will the newer geometry,less weight,less rolling resistance of a new bike make such a difference where the need for even lower gears is redundant?

 

[Spyrious]

Thanks for the info! I looked at both spectral and jeffsy geometry charts and they are almost identical.Any other benefits of the carbon vs the al?

[Spyrious]

Thanks for the reply.

What are the pros of the carbon over the al?

[Author]

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