These are Ultradynamico Mars Race in 29x2.2” mounted on Quill rims

https://ultradynamico.com/products/mars-race?variant=39763276660821

I’ll try to take pics this weekend.

Max

Sent from my iPad

> On Oct 19, 2023, at 5:20 PM, Thomas Wasko <thomas.wa...@gmail.com> wrote:
> 
> What are the specs on those tires (width, 650 or 700?)? How is clearance?
> 
>> On Friday, May 26, 2023 at 1:06:12 PM UTC-4 maxcr wrote:
>> A couple of pics from last week - Bombadil with new wheels (thanks Rich!) 
>> and rubber (thanks Ron!) around the Fresh Pond in Cambridge, MA
>> 
>> 
>> 
>> 
>> 
>> I'm still debating whether to keep the UD Mars on it or to move them to 
>> another bike.
>> 
>> Max
>> 
>> 
>>> On Saturday, April 15, 2023 at 2:46:05 PM UTC-6 maxcr wrote:
>>> The Hunqa is a 58, so more standover clearance for sure than the 60 Bomba 
>>> (see below). I think they both max out at around 2.1 - 2.3" for tire width 
>>> depending on your comfort of tightness.
>>> 
>>> As for weight, I moved the Nitto 32 rack from the Hunqa to the Bomba, 
>>> thinking that lighter might be more fun in rougher terrain, but they are 
>>> both similar frames and not super heavy - at least not for me. The Bomba 
>>> currently weighs around 43 pounds with racks, bags and double kickstand.
>>> 
>>> Max
>>> 
>>> 
>>>> On Friday, April 14, 2023 at 10:05:41 AM UTC-6 Matthew P wrote:
>>>> Hey Max!
>>>> 
>>>> I love that you consider the sanity of shipping bars back and forth across 
>>>> the country. Thank you for that.
>>>> I have similar concerns with buying direct from Blue Lug.
>>>> 
>>>> Oh I remember the confusion about the wheel size! And thats quite a hefty 
>>>> thread there.
>>>> 
>>>> I was in a similar boat as you before: multiple Rivs that were kind of 
>>>> similar. I used the wrong solution: I sold one that I really regret.
>>>> Ideally the bike with the most standover clearance (/lowest/slopest top 
>>>> tube) also fits the widest tires and is maybe the heavier of the two 
>>>> bikes, becomes the trail bike. It gets the widest tires, no fenders. Thats 
>>>> just my thinking. And the other bigger-but-lighter bike gets the skinnier 
>>>> tires - I like min 42 mm, max 2.1" (units ... sorry) 
>>>> Consider the Maxxis Ikons 2.2" (or 2.35"?) for your wider tire. But people 
>>>> really like the Thuderburts you already have.
>>>> Maybe make the Bombadil and Atlantis as different as possible in how you 
>>>> set them up.
>>>> 
>>>> And enjoy!!
>>>> -Matthew, San Diego - Kumeyaay Land 
>>>> 
>>>> 
>>>>> On Thursday, April 13, 2023 at 10:06:18 PM UTC-7 maxcr wrote:
>>>>> Thanks Matthew; the paint is really something! 
>>>>> 
>>>>> It’s a 60 - take a look at the initial confusion I had before getting it 
>>>>> - here’s the thread: 
>>>>> https://groups.google.com/g/rbw-owners-bunch/c/jK5Le9uiJ3E/m/mkygvvKuAAAJ
>>>>> 
>>>>> It’s a 700 wheel size and I think 2.1” would be comfortable and 2.3” or 
>>>>> more would be ambitious, particularly with knobs.
>>>>> 
>>>>> Following the Radavist’s bomba build, I had originally ordered MARS 2.3” 
>>>>> from ultradynamico but I got the wrong size (650) before getting the 
>>>>> bike… I returned them but still wonder how that would handle/look like, 
>>>>> so I might reorder at some point - what tires you would you use?
>>>>> 
>>>>> I’m lucky that I have a 58 Hunqapillar with 2.1” thunderburts and no 
>>>>> fenders as my hillibike, so I’m not in a hurry to make the change on the 
>>>>> Bombadil right now.
>>>>> 
>>>>> The seller said he got it from Riv in 2016, based on the serial, I think 
>>>>> it was made in ‘09 which seems in line with the timeline of when they 
>>>>> were being sold.
>>>>> 
>>>>> I’ll keep you in mind if I decide to swap the bullmoose bars although it 
>>>>> seems silly to have these huge heavy bars shipped from Riv to the east 
>>>>> coast to have them shipped back to CA.
>>>>> 
>>>>> Cheers!
>>>>> Max
>>>>>> On Friday, April 14, 2023 at 12:16:23 AM UTC-4 Matthew P wrote:
>>>>>> Hey there Max!
>>>>>> 
>>>>>> I love your blue Bombadil. It'd be a dream to score one at a reasonable 
>>>>>> price. I love that paint!
>>>>>> What is the frame size and wheel size?
>>>>>> I like fenders but I like even more maxing out my tire width. How wide 
>>>>>> can you go? You think about trying that?
>>>>>> Any idea on the year of the bike and where it was made?
>>>>>> Let me know if you want to sell the bullmoose bars  ;-)
>>>>>> 
>>>>>> Thanks for sharing and happy Bombadil'in!
>>>>>> 
>>>>>> -Matthew P in San Diego
>>>>>> 
>>>>>>> On Thursday, March 30, 2023 at 10:13:49 AM UTC-7 J J wrote:
>>>>>>> Thanks for the report and photos, Max. Beautiful build on a rare beast. 
>>>>>>> It looks like so much fun. Enjoy!
>>>>>>> 
>>>>>>> 
>>>>>>>>> On Mar 27, 2023, at 12:11 PM, maxcr <max.fai...@gmail.com> wrote:
>>>>>>>>> 
>>>>>>>> The weather is turning and I finally "finished" my Bombadil build. 
>>>>>>>> It's not quite finished because I'm not 100% sure I'll keep the 
>>>>>>>> Bullmoose handlebars - they are very stiff which is great, but the 
>>>>>>>> angle isn't ideal for my wrists, we'll see but I think the Jones bar 
>>>>>>>> is more comfortable for me. I might also explore a super wide drop 
>>>>>>>> from Crust called the Nullabar. I'm also curious about some drivetrain 
>>>>>>>> changes, more on that in a future thread.
>>>>>>>> 
>>>>>>>> I acquired the bike in January from a fellow in California who didn't 
>>>>>>>> seem to be riding it much. This is how it came:
>>>>>>>> 
>>>>>>> 
>>>>>>>> <bomba2.jpg>
>>>>>>>> 
>>>>>>>> I've started feeling more comfortable wrenching on my bikes (thanks 
>>>>>>>> Jason for the encouragement!) and did all of the work myself - 
>>>>>>>> ordering some parts from Riv, BlueLug and Crust. You've seen some pics 
>>>>>>>> over the last couple of months, but I want to officially introduce it 
>>>>>>>> in its new iteration. 
>>>>>>>> 
>>>>>>>> Yesterday I went out on a mixed terrain ride, first some pavement 
>>>>>>>> before arriving to the Middlesex Fells, a reservation with lots of 
>>>>>>>> trails and bike friendly gravel - I started following this route from 
>>>>>>>> UrbanDirt (pretty cool site with hubs in a few cities) but didn't 
>>>>>>>> finish it because i had to get back home. They have some really cool 
>>>>>>>> Ride-with-GPS routes you can follow, highly recommended.
>>>>>>>> 
>>>>>>> 
>>>>>>>> <IMG_9934.jpeg>
>>>>>>>> 
>>>>>>>> After getting to the entrance of the Fells, I started thinking that 
>>>>>>>> perhaps this wasn't ideal for my slick tires and fenders. Many of the 
>>>>>>>> trails had big rocks and require you to dismount and walk (see below) 
>>>>>>>> but I guess that's part of the fun so I kept going.
>>>>>>>> 
>>>>>>> 
>>>>>>>> <IMG_9918.jpeg>
>>>>>>>> 
>>>>>>>> <IMG_9923.jpeg>
>>>>>>>> 
>>>>>>> 
>>>>>>>> I walked up the slope and then started riding a winding gravel path 
>>>>>>>> with some smaller rocks. There were some wet / muddy patches but 
>>>>>>>> overall it was all very enjoyable and the bike handled great.
>>>>>>>> 
>>>>>>> 
>>>>>>>> <4EEC3310-9B05-419E-9A9D-3B2F0A9E8D1D.jpeg>
>>>>>>> 
>>>>>>>> 
>>>>>>>> <IMG_9930.jpeg>
>>>>>>>> 
>>>>>>>> I think the cockpit is ideal for this type of riding, which leaves me 
>>>>>>>> wishing the wrist position would be an issue. I'll give it more miles 
>>>>>>>> before deciding what to do.
>>>>>>>> 
>>>>>>>> I had to lower the bar quite a bit from my initial position because I 
>>>>>>>> wanted to use my Rod Steward (Pec Deck v2) and if I had the bars 
>>>>>>>> higher up, it just wouldn't reach. I'll take it off and try with the 
>>>>>>>> bars higher. It's also very close to the Paul canti arms, so maybe not 
>>>>>>>> the best fit for this build.
>>>>>>>> 
>>>>>>> 
>>>>>>>> <IMG_9935.jpeg>
>>>>>>>> 
>>>>>>>> When I stopped following the route and started following my GPS to get 
>>>>>>>> home, I ended up going through some areas that weren't very bike 
>>>>>>>> friendly - after the photo below. I had to carry the bike up a slope 
>>>>>>>> and ended up in a place with huge rocks. Once I crossed I rode a bit 
>>>>>>>> more and hit the main road which brought me back home.
>>>>>>>> 
>>>>>>> 
>>>>>>>> <IMG_9941.jpeg>
>>>>>>>> 
>>>>>>>> All in all, the bike was amazing throughout the 13.5 mile ride. I feel 
>>>>>>>> incredibly lucky to have found this rare 2TT on my size! Can't wait to 
>>>>>>>> go out again.
>>>>>>>> 
>>>>>>>> Max near Boston.
>>>>>>>> 
>>>>>>> 
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>>>>>>>> https://groups.google.com/d/msgid/rbw-owners-bunch/5b8e6756-4f27-433f-aa38-a5956758fa3en%40googlegroups.com.
>>>>>>>> <IMG_9930.jpeg><IMG_9923.jpeg><IMG_9918.jpeg><IMG_9935.jpeg><4EEC3310-9B05-419E-9A9D-3B2F0A9E8D1D.jpeg><bomba2.jpg><IMG_9934.jpeg><IMG_9941.jpeg>
>>>>>>> 
> 
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