Project Fixed Gravel Bus

The key to it all. (Image by A. Andonopoulos.)

 I have hinted at this all throughout December and now it is time to share what I've been up to over the past four or five weeks. I will also add the weather was mostly not conducive to being outdoors throughout this period, so it was a good thing to have this to do during the dive into deep Winter weather we experienced. 

Just a quick recap for those new to this story: I had a Twin Six Standard Rando v2 set up geared since around 2022, and for a year or two before that, as a single speed. When tires for gravel started to plump out to the 47mm - 50mm widths I was finding the Twin Six to be lacking as it barely handles a 44mm wide tire. So, I dreamt of retiring the T-6 and ended up replacing the T-6 with my Singular Cycles Peregrine Mk4 last September. 

Meanwhile, I had become enamored of riding fixed gear again via my road bike standard Shogun 1000, a 1980's vintage road bike, which has very limited tire clearances. My thoughts began to swirl - What would a fatter tire fixie be like? Then it hit me.....

Build the T-6 as a fixed gear bike, and move the Shogun down the road. So, this is what I have done. This now brings you up to speed on my journey up to the point where this project started.  

The first order of business was to build wheels. 

Thanks to Ari Andonopoulos and Jay Barre, I have this sweet Paul Components fixed WORD through axle hub. It is great Paul Components does this part, because it is not only high-quality stuff, but it is about the only game in town for fixed, through axle, and disc brake all in the same hub. Wacky one-speed rear device indeed!

To build the wheel set I needed rims. Fortunately I had a set of Velocity USA Blunt SS rims just chillin' in my shop. They were waiting for such a time as this! I also needed a front hub. I had used the old original front wheel in the Noble Bikes GX5 before in the Standard Rando, but this wheel was a mismatch from the standpoint of the rim. So, I broke the wheel down and harvested the front Stan;s Neo hub for this project.

Topped off with hand-cut DT Swiss spokes from Ari in the rear, and Wheelsmith spokes for the front, and this set of wheels was ready to go. Of course, I used my "signature wheel set" spoke scheme where I use half black, half silver spokes and nipples. The black spokes on one side get silver nipples and the silver spokes on the other side get black nipples.  

The wheel builds were fairly straight forward and besides one spoke, I had no real issues. Then it came to drive train parts. I had two screw-on fixed gear cogs to choose from. One was an All City 17T but is an 1 1/8th pitch. I also have a Dura Ace, vintage 3/32nds pitch cog in a 16T.  Both are black anodized steel. Not sure how they do that, but they are definitely black and definitely steel! 

I went the all-3/32nds route and so I have the Dura Ace part on the hub. For a crank set I came up with a 172.5mm Shimano 105 triple, Hollowgram crank set and I dismounted the three rings and replaced the middle one with a 39T steel ring from some old road crank set. It is a Shimano ring though. 

This meant I had to modify my Wheels Manufacturing Eccentric insert for a PF-30 shell. The left side bearing has that old, pre-DU(M)B spindle which had a 24mm drive side diameter and stepped down non drive side bearing. I knocked the SRAM specific bearing out, grabbed a Shimano outboard bearing sealed bearing cartridge, a plastic bushing, (top-hat) from same bottom bracket, modified the plastic bit, and used this. It worked perfectly. 

With a new SRAM PC 853 chain it now is locked-in and ready to roll. All I needed now were controls, brakes, and cabling. The handle bar is an old favorite, the Kitchen Sink Bar from Redshift Sports. I also used the same Redshift Sports ShockStop stem I had on the T-6 before I broke it up. A Shimano PRO seat post topped with a WTB Silverado saddle gifted to me recently by MG was the seating arrangement. (Thanks MG!!!) Then old Tektro levers in black were mounted as well. All I needed were cables, housings, and brake calipers. 

With everything but the calipers, tape, and cabling. 

 So, with the year closing out I was on the hunt for some brake calipers. It was the only thing I didn't have yet to make this a complete bicycle. Of course, I needed flat mount brakes, but they also needed to be mechanically operated. This leaves you with precious few options. 

You could do the bougie route. Paul Components Klampers or Growtac brakes (Velo Orange sells them), but we're talking hundreds of dollars for two brake calipers. Then you have the next step down in TRP Spyre brakes. Far less money for sure, but no big drop-off in performance. TRP/Tektro has a lower end version of the Spyre, which is slightly less money. Then you get into the sub-100 dollar per caliper brakes which of the lot, only Shimano is a brand I would trust. 

I hemmed and hawed about what to do. I was texting with Ari a few days before Christmas and he pointed out the half price offer on TRP Spyre calipers from an online store. I ended up ordering those as it put the per-caliper price under $65.00. 

Two days before Christmas. No calipers, but I just couldn't resist a test ride!

 I had strung the cables, but no wires, by a couple of days ahead of Christmas. It was pretty nice out for late December, and I had time, so I decided to go out for a short, brakeless ride. This would be on totally flat terrain and maybe for a few blocks and back, but I wanted to get a read on how this gearing was going to work out for me. I knew it was a little steeper than I had my Shogun set up with. 

I think it will be fine for most flattish terrain, but hills will be interesting! I'll just have to see how it goes over the course of Spring and determine what to do after that. 

 I think if Winter is going away, and for good, (fingers crossed), I will set up a different set of tires, But the 45NRTH Gravdal studded tires will grip ice and snow well. In case Winter comes back again, (more than likely), I'll keep them on. So we will see about tubeless tires at some point. Fenders may appear here in either case. I've got metal Planet Bike fenders or a brand new set of plastic Giant Revolt fenders too. We'll see how things fit to decide there. 

Finished Saturday evening 12/27/25

 Twin Six Standard Rando v2 (2020) in Saffron 

• Size: 59cm
• Frame: Steel (Twin Six never really says what, if anything, is special about their tube set) 
• Fork: Carbon T-6 (Again, no details but it does have internal routing for the front brake cable, Three-Pack mounts, and a 12mm through axle.) 
• Wheels: Hand-built using Velocity USA Blunt SS rims (28 spoke hole drilling), Mix of Wheelsmith (front) and DT Swiss spokes. Spokes in each wheel are all black on one side  with silver nipples, and all silver on the other side of the wheel with black nipples. Three cross lacing. (Guitar Ted Special Wheel build) Hubs are Paul Components WORD Fixed Disc (rear) and Stan's Neo (Front) 
• Track Cog: Vintage NOS black Dura Ace, 16T x 3/32nds.
• Chain: SRAM PC-853
• Chain Ring: Steel 39T Shimano of unknown vintage. (Likely 7 speed) 
• Crank Arms: Shimano 105 10 speed Triple modified for single speed use. 172.5mm length.
• Bottom Bracket: Modified Wheels Manufacturing Eccentric for PF-30 shell. 
• Seat Post: Shimano PRO
• Saddle: WTB Silverado
• Head Set: Enduro MaxHit stainless steel.
• Stem; Redshift Sports ShockStop Pro
• Handle Bars: Redshift Sports Kitchen Sink (46cm)
• Bar Tape: Ergon AllRoad
• Levers: Tektro short pull
• Brakes: TRP Spyre/Shimano rotors/Jagwire Pro housings.
• Pedals Fyxation Mesa MP's
• Tires: 45NRTH Gravdal, fully studded, with tubes. 
• Frame Pump: 1990's vintage Blackburn 

I'll have a ride report up once I can get out with this bike for a decently long ride. Indications are the stiffer T-6 frame will be a big benefit toward making the fixed drive train work its best. Gearing? Yeah..... I don't know yet! 

Stay tuned...