In today's "Two Things" post, I am going to discuss an idea for gravel bikes which came out of the Checkout discussion and another idea based on a bicycle I posted an image of recently which readers professed admiration for as well.
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My old 2006 Salsa Cycles Dos Niner. |
One of the ideas which came up during the recent discussion about the Trek Checkout was an old MTB design which has not really been thoroughly explored for gravel. This idea is the soft-tail design. I wrote about this idea in detail back in 2022 HERE.
I tried a soft-tail at the 2010 DK200, and there is merit to this idea. The thing is, no one has yet figured out how to best execute this soft-tail idea for gravel, especially from a vibration reduction standpoint. Unless you want to include Salsa's passive, in-frame designed Class V VRS. Which does do what we are talking about here effectively. (There are some other examples as well)
First of all, suspension for gravel, especially for racing on gravel, is pretty much a no-go. Any kind of interruption of power transfer from human to tire contact patch is a real negative for a racer. So, most anything you try to design for a suspension based vibration reduction system is going to be met with disdain from an efficiency and feel standpoint with a racer's perspective.
Soft-tail design might actually work if the resources were poured into the damper to give it resistance to movement when power is applied and allow the damper to work below certain power thresholds to help riders be less fatigued over a longer distance. This would probably mean a sophisticated electronic sensor and valve control set up. I think it is 100% possible, but who is going to go "all F1" on this idea? It would cost a LOT of money!
And then, like I said in the linked article, why not just use a suspension seat post? Less complexity, similar results. It wouldn't be for the Pro and semi-Pro riders, but for everyone else?
Maybe.
Does The Past Have Any Answers For Vibration Reduction?One of my recent images garnered a lot of praise in the comments section. It was of my Honeman Flyer, a custom made frame by King Fabrications, with geometry taken right off a 1936 era track bike combined in a stunning bit of paint work and was the muse of those folks.
While I could go on about the bike, the paint job, and how much I like this bicycle, I wanted to focus in on a thing I feel many companies miss out on and what was important in the past which maybe should be thought more about now.
That 'thing'? Ride quality. Maybe you'd call it "ride feel". Which ever way you want to describe this, I think we've lost our way by focusing on gear, electronics, and racing. Maybe we are relying too much on tires and vibration-reducing stems and seat posts. I think the original intentions for the geometry the Honeman Flyer is based upon might be something to consider when it comes to 'ride quality'.
This type of bicycle was made in the early to late 1930's, a time when extravagance was in short supply. Riders of custom-made bicycles had to pay a dear amount to get their hands on one bicycle. Maybe they threw in together with other riders in a club which afforded these members access to pure-bred racing bikes with stems and seat posts made to adjust to riders of different measurements. This was done as a way to get a racing bike for all club members and share the cost. This was fairly common in these times.
The predominate form of bicycle racing was still on tracks, but these were few and far between and riders from areas outside of tracks had to make do with training over rough back roads, on gravel, and where possible, on pavement. This meant that for many cyclists of the day who were competitive, their bicycle had to deal with rough roads, gravel, dirt, and be comfortable, handle well, and still perform as a track bike.
Tall order! But frame builders arrived at certain ways to accommodate this all, and in doing so, created a ride quality which was at once forgiving on rough stuff, a bike which handled well, and still rode fast, and produced good results at track racing events. One such design being produced by John "Pop" Brennan was ridden to national championships on the track by Willie Honeman. This is the design I copied and had Li King execute for me in steel tubing at his shop.
It is a very unconventional design from our 2025 perspectives, but it rides like a dream. Could it be that a litigious society, testing protocols, designs stemming from one-use mindsets, and fashion has clouded our ability to make a simple bike which rides nicely for the masses?
Again - Maybe so....
6 comments:
It’s really too bad that with every racing-oriented bike launch it’s standard to proclaim how much stiffer the frame is than the previous model. They’ll claim it’s “laterally stiff yet vertically compliant”. Stiffness is an engineering metric that’s well defined, yet there is no standard definition for compliance. Compliance is not the opposite of stiffness, it’s flex and damping but in specific ways in different parts of the bike in ways that reduce fatigue. Pro racers (and people that want what they use) tend to focus heavily on the numbers, so subjective things like compliance get ignored and quantitative things like watts of drag and stiffness become selling points.
Add in disc brakes which require a stiffer fork, low weight targets, and limited engineering budgets and suddenly ride feel becomes both difficult to achieve and a feature that doesn’t sell bikes. The natural result is companies trying to make a profit are going to ignore or at least de-prioritize ride feel.
As you’ve said many times, most people should ride bikes that aren’t influenced by racing, but in reality most enthusiast bikes are influenced by what pro racers want.
I've never ridden one (the frameset alone costs $6,200 - lol), but the Moots Routt YBB is a soft tail gravel bike. Just go ahead and buy one of those and test it for us ok Mark? lol
From the seatpost standpoint, I had a bike fit in 2021 on my Scott Addict Gravel (the frameset that was still just a cyclocross bike with the word "gravel" on the top tube), and new I needed to get a 0 offset seatpost. I bought a Roval Terra seatpost as it looked "normal" and promised some flex. Obviously it isnt magic, but the dang thing does the job. I thought I had a flat tire for a bit going out on gravel with 700X40mm slick tires (those things barely fit on this frame). I have since converted that to a road bike and the post is still one of my favorite parts.
I've been bombing around my part of Vermont (the Champlain Valley) the last few weeks, partly on my gravel-ified Blackborow and partly on my fixie Pake Rumrunner- basically trying to do longer commutes home in the fading sunlight while capturing the bits of dirt road (I refuse to call what we have in VT "gravel.") Even where I am (not really in the mountains but certainly the foothills of Vermont) it's hard to find a gear on the Pake that can get up everything without spinning out too frequently on the downhills, but when it works and it's speedy, it works. The Blackborrow is built up like a 35-pound pig and rides like one, but has gears and two brakes so when I'm exhausted from grinding/spinning the Pake it grants me respite and lets me hit up a few steeper places when I want to. Your flyer looks like my perfect N+1 (maybe with a three speed!). I love the geometry. What's the closest production frame out there (for us plebes)?
@Nooge - Thank you for your comments. I agree with you 100%. Perhaps hard numbers are an easier sell than a nefarious, subjective "ride feel" which is difficult to quantify. This may be why "winning" bikes get sold over bicycles which actually are fun and practical to ride.
@Tyler Loewens - Moots YBB gravel bike - Noted. Thank you. I'll likely never be contacted to review a Moots. I've said online their products are over-priced, which I am sure Moots wasn't too happy about back when I wrote that.
Seat posts: Oh yeah! I'm all about a compliant post.
@Matt Boulanger - The Pake Rumrunner has some steep/high geometry! I tip my cap to you for running a bicycle like this fixed in the hills of Vermont!
The Honeman Flyer is, by comparison, VERY different. Slacker, longer, lower. As far as current bicycles, well, I just don't know of anything close, at least in an overall sense. From the bottom bracket forward the Flyer isn't too weird. 76mm BB drop and a 71° head tube angle. But from my point of view, it is the rear of the bike where the "magic" comes from.
Those longer stays and slack seat tube make the rider's weight flex the frame in a unique way which, again in my opinion, keeps the pedal to hub power transfer good while allowing enough give over the entire structure to cause a smoother ride. I kind of wish I had gone with a steel fork too. I bet this would have enhanced things further.
Ol' Pop Brennan knew what he was about when he designed this geometry, I'll tell you that!
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