a metalurgical question
07-21-06, 12:35 PM
#1
Senior Member
Thread Starter
Join Date: Oct 2004
Location: minneapolis
Posts: 607
Bikes: iro mark v 48x16 or 15 i think (fixed), surly 1x1 32x16 (free)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
a metalurgical question
salsa makes a "short & shallow bar" using 7075-T6 aluminum, and a "moto ace short & shallow bar" that uses 6061-T6 aluminum.
without getting super technical, which is better and why? my guess is that it's the former as it's more expensive, but that logic doesn't always bear itself out.
anyway, my LBS sold me the "short & shallow", not the moto ace, so it's pretty much a done deal.
without getting super technical, which is better and why? my guess is that it's the former as it's more expensive, but that logic doesn't always bear itself out.
anyway, my LBS sold me the "short & shallow", not the moto ace, so it's pretty much a done deal.
07-21-06, 12:46 PM
#2
Senior Member
Generally speaking more expensive bars tend to be lighter, but not necessarily stronger. They'll use the fancier alloy to try to build a lighter bar of the same strength. so if the couple of grams you save is worth $20-30 then cool, if not the Motoace is fine. I bought the Motoace version of the Bell Lap, and they are awesome bars light and stiff. On the bike I doubt if I could ever tell the difference.
07-21-06, 04:36 PM
#3
Senior Member
Thread Starter
Join Date: Oct 2004
Location: minneapolis
Posts: 607
Bikes: iro mark v 48x16 or 15 i think (fixed), surly 1x1 32x16 (free)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
one response, 49 views. the rest of you jerks were going to get all technical on me.
07-21-06, 04:58 PM
#4
Senior Member
in bmx more expensive sprockets were made of 7075 which is more durable and resists chain wear and bending as opposed to the 6061 counterparts. This probably doesn't help you at all.
07-21-06, 05:03 PM
#5
Zippy Engineer
Join Date: Jan 2003
Location: IN
Posts: 1,801
Bikes: Bianchi 928, Bianchi Pista Concept 2004, Surly Steamroller, 1998 Schwinn Factory Team Homegrown, 1999 Schwinn Homegrown Factory, 2000 Schwinn Panther, Niner EMD9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
7075 is stronger but more brittle, whereas 6061 is easily formed.
07-21-06, 05:06 PM
#6
Banned
Join Date: May 2005
Location: GA
Posts: 5,317
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
If you don;t know you don't need it. Go with the cheaper one.
7075 has over twice the tensile strength of 6061. It also is less flexible(but not by a factor of two). If you are one of those people that fears aluminum and it's durability get 6061. If you are a weight weenie get 7075. Chances are the 7075 are designed to be stiffer too but that may not be the case.
7075 has over twice the tensile strength of 6061. It also is less flexible(but not by a factor of two). If you are one of those people that fears aluminum and it's durability get 6061. If you are a weight weenie get 7075. Chances are the 7075 are designed to be stiffer too but that may not be the case.
