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Aluminum v. Reynolds 631 v. Reynolds 520(8 posts)

Aluminum v. Reynolds 631 v. Reynolds 520levs
Nov 14, 2003 3:32 PM
All else being equal, for standard city commuting and light to moderate touring, which is preferred?
re: Aluminum v. Reynolds 631 v. Reynolds 520jrm
Nov 14, 2003 6:04 PM
If had to choose i'd choose 6061 over reynolds 631 or 520. Chances are that on a bike using either 631 or 520 will have a 4130 rear end in order to boost that they are using 631 or 520 and make a price point.

6061 in a frame size that fits you with 28c tires would be fine for what your anticipating. The only conidtion is that the frame be fitted with a carbon fork.
re: Aluminum v. Reynolds 631 v. Reynolds 520wooglin
Nov 14, 2003 6:33 PM
Plus aluminum won't rust. Although I'd choose steel anyday, 4130 rear triangle or not.
re: Aluminum v. Reynolds 631 v. Reynolds 520jrm
Nov 14, 2003 7:57 PM
steel isnt steel til its 853 or XO true temper all the way through.
re: Aluminum v. Reynolds 631 v. Reynolds 520wooglin
Nov 14, 2003 8:09 PM
I'm a 531 guy myself. Sadly, its getting hard to find. ;)
631 is pretty good, comfortable and a bit lighter than 531...Spunout
Nov 15, 2003 4:14 AM
although not as stiff as my 853 Pro (Lemond). 631 bike is a Jamis Nova, and I race cyclocross with it, so it is tough enough, light enough, and stiff enough. I could never envision racing cross on an aluminum frame. Around here, the fast stretches over frozen fields and rooted singletrack will never get me away from steel.
Steel FactsHeron Todd
Nov 15, 2003 9:08 PM
Fancy steel alloys like 853, OX Platinum, and even 631 are designed to have extra strength so you can use a thinner-walled tube while maintaining suffficient strength. However, when you go to a thinner wall, you lose stiffness. All steels are equally stiff. So, if you are building a race bike for a relatively light rider who carries no gear, 853 and OX Plat are a great way to drop some weight. However, when you want some extra stiffness for a larger rider and/or one who carries gear, you will use a thicker wall. Once you do that, regular cromoly or 531 will have enough strength so there is no need to spend extra for the fancy steels.

So, fancy steels help build a lightweight and strong frame for lightweight use. For applications requiring extra stiffness, regular steels work just as well and cost less. For a "commuting and light to moderate touring" frame, I'd look at a good double-butted cromoly like Reynolds 525 or True Temper Verus.

Todd Kuzma
Heron Bicycles
LaSalle, IL
Steel Factslevs
Nov 16, 2003 12:01 PM
What about 520 v. Aluminum??