Ted Durant weighed the frame and fork of his 51 cm Sam and found >> 2637 grams for the frame (including headset cups, water bottle bolts, and seat post binder bolt) and >> 844 grams for the fork (including crown race).
which helps explain the pleasant ride of the Sam, and how people report loving it for randonneuring. Given the touring pretensions of the Hillborne, I find it hard to understand that the fork is lighter than the Roaduno fork, which we're told elsewhere uses the tubing of the Homer, a somewhat lighter bike than the Sam. Roadeo and Roadini ought to be lighter still, and I would expect that to extend to the fork. My tourers have steel unicrown forks that weight right at 1000 g -- a hair over for the Gordon BLT, a few grams under for the Cannondale T400. This is appropriate for touring with a front load, but does not bring much joy when riding unloaded. Another steel fork I recently weighed is from my '81 Motobécane Grand Touring -- 880 g. That bike is a pleasure to ride. Not to say that weight alone determines how a fork will ride, but it is a factor. My Cannondale ST600 sport tourer rides better than my T400, and that fork was right around 900 g. Great ride, lowrider braze-ons notwithstanding. The conclusion I draw from my playing around with different models is that a frame can't really be too stiff, but that a compliant fork makes for a pleasant ride -- assuming everything is properly designed, of course. I should buy a Sam fork and try it out on my tourers -- the geometries are otherwise similar, so it would probably work. On Saturday, November 23, 2024 at 10:40:50 PM UTC-5 Bill Lindsay wrote: > My educated guess on the frame weight is to read the weight that Riv > claims on the page for the CHG: "A 57cm frame weights about 4.8lb. That's > plenty light." > > My educated guess on the fork weight is a few grams lighter than what my > RoadUno fork weighs, because I weighed it at 993g. My guess is 970g. My > Roadeo fork is 883g. > > BL in EC > > On Saturday, November 23, 2024 at 6:33:27 PM UTC-8 Jason Fuller wrote: > >> Bill - I'm curious whether you have insight into the real weight of the >> Gallop frameset, and if not, what your educated guess might be. I am not a >> weight weenie (anymore) at all, but still I would love to see (or host, if >> need be!) a Rivendell frame weight library. Not because I think less is >> better, but because you can get a good sense of how a frame will behave >> based on its geometry and weight as well as what it's appropriate or not >> appropriate for. >> >> A lightweight Roadini build is easy to imagine because there are so many >> similar examples out there. A lightweight Charlie build is a really >> interesting concept because there'd be nothing quite the same: long >> wheelbase, swept bars, but minimalist like a cafe racer build. 1x, foam >> grips, extralight tires on a nice road wheelset. I'm into it. >> >> On Saturday, 23 November 2024 at 10:38:14 UTC-8 isp...@gmail.com wrote: >> >>> I’ve never been guilty of building a ~20 lb road bike, LOL. That said, >>> if you’re not starting with light wheels and tires, then nothing else >>> matters because rotating mass is where you feel it. Although I won’t be >>> jumping on the TPU tube bandwagon - got one as an experiment and the valve >>> just plain fell off during installation. Anyway, light wheels in the >>> $500-$1000 range, and light tires like RH, will make even a pig of a heavy >>> frame feel light when riding on the flats. >>> >>> Then per Bill’s remarks, it’s a method of looking at every component. >>> Crank, BB, brakes, handlebars, and so forth. I wonder how many folks are >>> achieving light weight with a Brooks saddle, versus anything else where a >>> plastic frame drops a lot of ounces. >>> >>> On Friday, November 22, 2024 at 10:14:01 AM UTC-7 erik.s...@gmail.com >>> wrote: >>> >>>> Great question! I'd love to build on it by asking about process as >>>> well. When you (Bill and others) sketch out a lightweight build, how do >>>> you >>>> go about it? Are there big ticket items that you know will save major >>>> weight, and go from there? Do you plan to include things like Titanium >>>> Rene Herse M5 Bolts >>>> <https://www.renehersecycles.com/shop/equipment/bottlescages/rene-herse-m5-bolts-titanium/> >>>> or >>>> are those a little goofy? What do you focus on when thinking holistically >>>> about a sub-20lb, steel, reasonably spec'd (subjective term I guess) bike? >>>> >>>> I lightened up my Sam Hillborne a couple years ago and a few components >>>> that brought major weight savings were swapping the Sugino crank for a VO >>>> 50.4; Rene Herse EL tires; and having my LBS build me a 32h Pacenti Brevet >>>> dynamo wheel set (replacing a Velocity Atlas). I actually asked about >>>> wheels here >>>> <https://groups.google.com/g/rbw-owners-bunch/c/h_M96a8UWng/m/pLwYoYMeAgAJ>, >>>> >>>> and wound up taking Bill's advice to find a M737 rear hub on ebay for the >>>> rear wheel. I've never weighed the bike, but it's light enough that when >>>> people move it or pick it up they often say "wow, light for a Riv" >>>> >>>> Erik, Philly >>>> On Friday, November 22, 2024 at 11:52:52 AM UTC-5 Bill Lindsay wrote: >>>> >>>>> I've sketched out a sub-20 pound Gallop build, employing zero carbon >>>>> components. I had a lightish Leo Roadini a few years back, but it was not >>>>> sub-20 pounds. Is anybody else out there scoping out a light Gallop or a >>>>> light Roadini build? >>>>> >>>>> Bill Lindsay >>>>> El Cerrito, CA >>>>> >>>> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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