New Bike Day -- RAMAX, a Very Modern and Beautiful Titanium Frameset

Obligatory new bike photo.

Nearing Takasaki, along the Usui River

On Wednesday, March 9, I went to GS Astuto in Matsuida, Annaka City, Gunma. The plan was that I would ride my Renovo there from Takasaki and Tim Smith, with a bit of help from me, would take the Ultegra Di2 disk brake groupset off of the Renovo and install it on a new frameset, a titanium RAMAX (Randonneuring Adventure MAXimum), that I would ride home. 

The RAMAX frameset is Tim's design and incorporates everything he has learned from more than a decade of designing the Astuto titanium frames and accommodating the latest updates in components and styles of riding. He told me that his idea was to "future-proof" the design so it is versatile and works with the latest components and any coming down the pike in the next few years.

My last new frameset purchase (aside from the Pelso recumbent) was in 2015. Things have changed a lot in seven years. Back then, there was almost no "gravel bike" or "all road bike" category. Clearance for wide tires on a road bike, even an endurance road bike, meant 700x28mm or maybe 700x30mm tires, not 650Bx50mm. Disk brakes were on the way in, but still in a distinct minority. Axles were mostly QR (quick release), not the beefier 12mm thru-axle. Rear wheel spacing was a standard 130mm. Electronic shifting was still a limited, high-end option. Large diameter press-fit bottom brackets had started to proliferate, bringing with them problems of poor fit that had yet to find a solution.

Tim unwraps the frame

GS Astuto headbadge

Lovely curves, fender attachment

Beautiful welds. 

I love my current titanium frameset, the Ti Travel Bike with S and S couplers. In fact, I am planning a major component makeover for the bike's second decade. But I got that frame from Tim/GS Astuto in 2012, an early vintage. The Ti Travel Bike is designed for rim brakes, a mechanical (but not Di2) groupset, it has a standard BSA threaded bottom bracket shell, and can fit only 25mm or 26mm wide tires in the rear, not 28mm or wider. The RAMAX is made from the same raw material, but a different beast.

Titanium has long been considered a highly attractive material for bicycle frame tubing. Larger riders, especially, praise the "lively ride feel" of titanium frames -- which can be quite similar to the feel of the best steel frames. It is far lighter than steel for the same tensile strength, and far stronger and much more resistant to metal fatigue than aluminum alloy. Titanium is highly resistant to corrosion -- another advantage over steel frames -- such that the frames do not need to be painted.  And titanium can get banged up a bit without generating that gnawing feeling in the pit of the stomach one gets on a carbon frame that has taken impacts. The combination of resistances to metal fatigue and corrosion make titanium the best candidate for a "lifetime frame".

But titanium tubing has undergone a revolution in the past decade. Titanium historically was a difficult (and expensive) metal to form into tubes of various shapes. So a typical titanium bike in 2012 (e.g. the Ti Travel Bike) had round tubing for its four main tubes -- head tube, top tube, down tube, and seat tube. Round tubing may not offer as good ride qualities, or power transfer/stiffness, as other shapes. This practical limitation was removed with the invention and gradual expansion since 2012 of "hydroforming" techniques that allow fabricators to make tubes of various shapes more easily and economically. The RAMAX takes advantage of this with an ovalized down tube and seat tube that attach (are welded) to the bottom bracket shell in shapes that offer far greater lateral stiffness. This offers a feeling of stiff power transfer I have only before felt on a carbon-frame bike. The RAMAX top tube has a nearly flat top side -- aesthetically very pleasing and also offers increased lateral stiffness. 

Headset cups are set in now.

The RAMAX seat and chain stays offer clearance for up to at least 650Bx48mm tires (perhaps 50mm?). The head tube is a larger diameter and will accommodate different diameter fork crowns depending on the headset used. The all-carbon fork also offers lots of clearance for tires, looks lovely and while noticeably beefier than that on, say, my old Canyon Ultimate CF, is far less heavy and more graceful than some of the early disk brake CX carbon forks.  The BB shell is T47 -- the logical answer that gives the "best of both worlds" -- the larger diameter of those troublesome press-fit designs, the stability and easy installation/removal of a threaded BB, and adaptability to many different crankset standards.  The frame is designed for thru axles, which are now widely favored over QR skewers for off-road applications such as gravel and are safer and work better with disk brakes as well. (Most disk brake road bikes now come with thru axles -- some hubs have end caps that can be replaced to accommodate either QR or thru axle ... but not all, and certainly not older hubs.)

I made a new friend -- Latte.

My wheelset on the Renovo (Velocity Aileron rims) is a disk brake set with hubs designed for QR skewers (not adaptable to thru axle), ... so Tim lent me a similar set of Ailerons with thru axle hubs. He is building me another set, as soon as I can get a dynamo hub with thru axle for the front wheel. ...  I will use the Renovo wheelset as a backup for the Pelso (which is QR drop outs/disk brake).

The RAMAX has a "direct mount" for its rear derailleur. This is a Shimano design that works with their newest derailleurs. It offers a very solid and secure connection and should avoid the typical derailleur mis-alignment issue from a minor bump of the derailleur somewhere along the way, in transit by rinko bag perhaps. (SRAM does not use "direct mount" but apparently has its own similar "universal derailleur hanger" design in the works). The direct mount cannot be used with an older "classic" derailleur. In building up the bike, this was the one place where my ca. 2014 Ultegra Di2 groupset would not work on the bike. Instead, I swapped my Ultegra Di2 rear derailleur for a GRX direct mount version Tim had on one of the Astuto bikes. He tells me he has use for the Ultegra derailleur on a bike that has a "classic" derailleur hanger. After a firmware upgrade, the GRX/Ultegra Di2 combination worked (and works) perfectly.

The disk brakes ... well, Shimano hydraulic disk brakes are very nice.  They are a bit heavier than rim brakes, and not as easy to fix if there is a problem at roadside on a cold, wet night, ... but they work beautifully and, set up properly, can work without adjustment for a long, long time. They are far better in the rain than the typical rim brake set up. They also solve the problem of a heavy rider melting rims on a carbon clincher with rim brakes. And with a hookless set of disk brake-specific carbon rims, the weight differential disappears.

How does it ride? Well, my first impression is that it will be an extremely capable, balanced, and comfortable bicycle! It feels light and quick, even with the 700x36mm somewhat knobby gravel grinder tires. The BB is 1~2 cms higher off the ground than on a road bike -- not just the fatter tires, but also a bit of CX/gravel design? The seat, bars, etc. are all similarly higher. As mentioned above, the bike feels very responsive and alive. And it also feels ultra-solid and reliable in corners (this could be the wide Aileron rims and Challenge tires ... but it is the whole system). I suspect that, with time, this solid feeling will add to my confidence and I may find myself going downhill a bit faster, laying off the brakes a bit more, than in recent years. 

I will get the bike dialed-in over time. I will eventually have a front hub with an SP Dynamo for 24x7 lighting. And I will have lots and lots of opportunities to ride it in coming months and years. I'm looking forward to it!