Posts filed under Custom Bikes

Soma ’Saga’ Touring Bike.

Another semi custom bike leaves Cycle Depot.

Every once in a while we have someone enter the store that has been bitten by the touring bug. The urge to travel and explore uncharted territory. To follow in the footsteps of Magellan, Polo, Cook and the like or, as in this case, to put a tick on the bucket list by touring the US for a couple of months.

Soma Saga-52.jpg

Our remit for this build was to produce a bike that was suitable for light, medium touring, therefore no real need for a tank of a frame capable of hauling around 300lbs of ones essential chattels and assorted paraphernalia. Other requirements were chiefly comfort and relaxed ride position, slightly elevated front and the option of multiple ride positions on the bars. The rider also had requirements for preferred cadence and obviously riding style. The rider, as always, was measured on a body jig and a full CAD workup produced.

Soma Fabrications of San Francisco CA produce a frame for just about any genre of riding. I think it is safe to say that we have used Soma frames on around half of all the semi custom bikes we have built. The geometry is always well thought out and, whilst not always cutting edge or pushing any envelopes, it is usually just about perfect for real world applications. The Soma ‘Saga’ frame used in this build is another example of this.

Soma Saga-26.jpg

Obviously high on the priority list is always the subject of wheels. In this case we opted for traditional and strong. The Shimano XT disc hubs are hard to beat especially at the price point. The tried and tested cup and cone bearing setup is executed perfectly by Shimano, machined cones and boron coated, I rebuilt and adjusted them to my preference, they, like others always seem to be a little on the tight side out of the box. These were then built up using straight gauge 2.0mm spokes with hub washers laced to Velocity Atlas rims, 36 hole and a 3 cross pattern, brass nipples and wheelsmith prep. The hubs are available with a standard 6 bolt disc mount or the proprietary center lock. I opted for the more standard 6 bolt mount. I do not anticipate the need for a replacement spokes obviously but if the need does arise some spares of the correct lengths are attached to the frame on the non drive side seat stay,. This is a nice feature found on some touring frames and I think it looks cool and it would be churlish not to use it.

Soma Saga-87.jpg
Soma Saga-77.jpg

Because of the gearing chosen for this build, we were really pushing the boundaries of what modern Shimano and Sram group-sets are happy with. Both the major group manufacturers do not really offer a touring package. It has come to a point now that mixing and building your own ratios and ring setups is becoming a bit more of a chore. Shimano, Sram and Campagnolo crank sets are very sophisticated and the rings are matched to each other, not that these setups do not work at all when you mess with them but, they ain’t great either. In this case we wanted a front triple chain ring range of 48’ 36’ 24 and a rear 10 speed cassette of 11-32. The crank-set we ended up using was a beautiful Alpine 2 from Sugino. getting weird chain wrap figures and requirements you have to think a little more outside the box.

MicroShift R10 3 x 10 Brifters

MicroShift R10 3 x 10 Brifters

An often overlooked brand when it comes to shifters is Microshift. This company has been around for quite some time, producing very reasonably priced derailleurs and shifter units that we routinely use as replacements on entry level bikes when budget is an issue. However in the last few years Microshift have been upping the game and offering components that are very usable and in fact are a great choice in certain instances. This is one of those occasions.

Soma+Saga-59.jpg

Another bonus of the R10 brifters is that they really work well ergonomically on the handlebars. We chose the Salsa Cowchipper bars for this project. These things are great for touring bars. When spending long hours on the bike you need to have a good selection of comfortable positions to switch through. Another requirement of a laden touring rig is stability. A good touring bar needs a bit of spread to it so as not to fatigue your arms wrestling the bikes mass.

Soma+Saga-66.jpg
Soma Saga-63.jpg

The hoods on these things are comfy too, not Campagnolo comfy but pretty plush. The red flash doesn’t look bad either.

The operation on these R10’s are a double lever system and pretty easy to get used to no mater what you are coming from. The actuation feels really solid and you get a definite click and release through the levers. It all feels really solid and robust however it does not require much pressure on either lever to actuate.

Soma Saga-40.jpg

The front derailleur, just making an appearance in the above picture is also from Microshift, it is quite happy to swing back and forth over a triple and doesn’t mind one bit it is going from a 48 to 24…

The rear cassette is a standard Shimano offering and, in this case, the Shimano and Microshift rear derailleurs were evenly matched. On paper they both had chain wrap capacities lower than required, however experience has shown there is always a little wiggle room and that was the case here. A Shimano 105 GS 5701 is handling the slack chain like a champ. I was expecting it to bottom out in the 24-11 but no. I know that some of these gear combos are not ordinarily used and running the chain on the two extremes is something anyone in their right mind would not do, unfortunately pedaling a fully laden touring rig up your average Alp can affect your common sense somewhat so a fully functioning shift system capable of every eventuality is paramount.

Soma Saga-56.jpg

One of the drawbacks to using the Microshift brifters is the lack of a hydraulic brake lever. I am a huge fan of hydraulic disc brakes and love the feel and power you get from them, that is not to say that cable actuated offerings are bad it is just the hydro’s are that much nicer and are to be used wherever possible in my opinion. So in this case the option was any of the cable discs, and I would have gone with Avid BB7s, or use something a little different. What you are looking at here is an hydraulic brake caliper operated by a cable. Genius. Yokozuma have been producing these units in a couple of guises now for quite some time and they are fantastic. They have a built in reservoir and you can adjust the feel quite easily via the little red turn knob, by playing around with the turn knob and where you clamp the cable you can adjust the feel of the brake lever to suit your taste. The end result is a brake that has the power and most of the feel and modulation of a full hydraulic along with the self adjusting and regulation as the pads wear down. The cable is a standard road brake, stainlesss steel and 1.5mm. The housing is a bit different, it is very substantial and is also produced by Yokozuma. Basically it is a compressionless housing with a full compression wrap over that. You could also use a standard brake if need be.

DSCF2105.jpg
Soma+Saga-28.jpg

Another component that we have used a few times now is the Cane Creek eeSilk seat-post. These are turning into real crowd-pleasers. The elastomer can be tuned to rider weight and preference. There are a few different elastomers in the box and also a small tool that really makes changing them a breeze. We have this one setup quite plush but still firm enough so as not to give the dreaded bob whilst pedaling.

Soma Saga-23.jpg

Of course no touring bike would be complete without a Brooks saddle. Built in the same way since 1866 these things are de rigueur on all touring bikes. I think it is the law… In this instance we have chosen a B17 model in a very complimentary steel blue.

Soma Saga-1.jpg

So, here we have the final result. The frame accommodates any style of racks and is equipped, for now with a base 100lb rear rack. Initially the bike will be ridden with just a rear rack bag and 2 side panniers. The fork will also accept low rider racks and will probably utilize those at some point. We tend to recommend using the low riders to keep the center of gravity down on the front and using them for lightweight bulky stuff.

alen.JPG

Another happy customer. “Happy Touring Alan”

One More Custom Bike.

IMG_3342.JPG

The last full custom bicycle of the year has just been completed and rolls out of the store with its new owner. Anyone visiting the store over the last few months has probably seen parts of this build laying around the workshop and the frame had been hanging on a hook for longer than usual. Everything about this bike has been meticulously planned and built to create the perfect bike for the rider. A few teething problems along the way, as with all custom builds, however the end result, though slow in coming, has been worth the wait.

The frame is a full custom design, built around the riders measurements and the geometry set for his personal style and intended use, in this case the design is for a very quick handling, light gravel bike. The frame is built in Titanium and was built by master frame builder Mike DeSalvo in Oregon. The wheels are hand built by myself using DT Swiss rims and modified hubs from White Industries. The shifting is by a cable actuated traditional setup but the brakes are hydraulic. Whilst on the subject of brakes, one of the biggest features on this bike is the braking system. The calipers are from Hope in England and are completely machined from one single piece of aluminum, obviously being from England they used Alumin(i)um… Despite the spelling this is a very complex caliper. Designed for use with a road bike lever they are small in size and lightweight but have fantastic stopping power but still maintain good feel and modulation at the lever. The calipers actually have 4 pistons and need a good amount of fluid, the hose was originally a braided stainless, specially designed to be used with these calipers, unfortunately we had a few problems with it and eventually a failure in the casing itself. At the moment we are using Shimano high flow hose but eventually we will switch to braided high flow hose from Jagwire. We just need to customize the fittings for the caliper end and the lever end to suit. The rotors are also from Hope and are their floating design that have been around for a while now. I will do a separate post on the reason behind this design of rotor at a later date.

DeSalvo-11.jpg
DeSalvo-37.jpg
DeSalvo-32.jpg

Wheels are setup to run tubeless and are running a 700 x 30 tire. The wheels have been laced using spoke washers at the hub and rim washers in rim along with the DT Swiss pro head nipples. Tension is maxed out on these rims obviously and the 32 spokes are laced in a 3 x pattern. As much as I love DT Swiss rims, spokes and hubs, I am not a big fan of their tubeless rim tape so I opted instead for Whiskey brand tape. I also departed from the usual sealants and went instead to Finish Line. Should have a little longer before it dries.

DeSalvo-117.jpg

Running a standard 50/34 chain ring combo however, we have gone to our favorite brand for rings, Praxis. This is their “Zayante” model. The derailleurs front and rear are standard Shimano units although you may be unfamiliar with the newer shape and, especially the cable routing on the front. The rear is a Shadow model and shares some characteristics with standard road and some mountain bike models. Ideal for this gravel application. These new models have fantastic chain wrap and engagement. Rear dropout is thru-axle and the less common Syntace style.

DeSalvo-46.jpg
 

So there it is, the last full custom of 2018. This bike has been in the workshop for so long I miss it now that it is gone. The owner is local so I will get to visit with it and if you are riding around the area keep your eye out for a glimpse but you won’t catch it…

DeSalvo-64.jpg
Posted on November 25, 2018 and filed under Custom Bikes.