This is very precise and useful information; I learned things I didn’t know. Thanks for sharing.
On Thu, Mar 20, 2025 at 4:57 PM Ben Miller <[email protected]> wrote: > … A few things: > > > 1. Soma/Merry sales sells an aluminum 31.8 clamp Albatross bar > > <https://www.somafabshop.com/shop/nitto-handlebar-b352-albatross-2766?category=781#attr=3506,1359,1211>. > It's 1 cm wider (56 vs Riv's 55), but still narrower than the Billie. I > know you just purchased a new handlebars, but this might be option for you > with a 31.8 Faceplater? > 2. I mentioned with in another recent post, but more bolts doesn't > necessarily mean more better. The maximum clamping power of a clamp/stem is > only related to the lowest torqued bolt in the clamp/stem. I know this is > counterintuitive, but it's all about the bolt size, not the number of them! > Since M8 bolts can be torqued higher M5, a Tallux stem can be torqued to a > higher spec and likely offer better holding power compared to Faceplaters > with their M5 bolts. (Torque specs are *only *for bolts, those will > break long before you're able to damage a handlebar thru over tightening) > 3. Besides the bolts, the other major factor preventing bars from > slipping is the clamp diameter. That's why MTB have gone to 31.8+ size > clamps (it's not to stiffen them, because then you'd have to increase the > diameter much more than just at the clamp). So, everything else being > equal, an Albatross 25.6 in a 25.6 clamp or shim will slip easier than an > Albatross 31.8 in a 31.8 clamp. (Shims really just convert your 31.8 clamp > to a 25.6 clamp, *not *to 31.8 handlebars) > 4. Final note on torque specs: to get the maximum clamping force from > your multi-bolt stem, always torque to the maximum torque spec. One of the > things that multiple bolts do offer, is a decreased likelihood of breaking > a bolt. However, with a single bolt, you're better off torqueing to the > lower end of the spec, to decrease the likelihood of breaking your single > bolt. And this is the reason why stems with M8 bolts can have only 1 bolt, > but stems with M5 bolts need to have 2 or more. The lower end of the torque > spec for an M8 bolt is still 2 or more times greater than the max torque > for an M5. > > > All that said, I do have a set of drop bars with 25.6 clamps size in a > 4-bolt stem shimmed from 31.8 to 25.6 on a rigid MTB, so I don't > necessarily think there is anything wrong with it. But albatross bars are > going to generate a lot more torque on the clamp area with their big long > levers of swept backiness :) > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/rbw-owners-bunch/CALuTfgs8-Nif0HW4MAdXLMvgR8LBZboxpDzNu3YFvmqw%3Duhk%3DA%40mail.gmail.com.
