What can I do to improve it?

Vargas

Well-Known Member
This weekend I didn't have a very nice experience with my conversion bike (very much like a SofRider).

Some friends invited me for a ride to a waterfall at a city not far from Rio de Janeiro.
They are mountain bikers and when I asked how hard it was going to be, since all the ride was going to be on unpaved roads (Brazilian unpaved roads). They said it was going to be very light, most descents to the waterfall, and after reaching the waterfall we would return to the city following an abandoned railway path - much longer but a small gradient. Of course I accepted.

The way to the waterfall was most descents but there were also some steepy ascents. The road had sand on it and lots of irreguraties. I couldn't keep a constant cadence in the ascents and lost traction all the time, even using the smallest gear, having to push the bike uphills.

The first "What can I do?":
I have a Shimano Alivio group with a triple chainring 44-32-22 and 11-13-15-17-20-23-26-30-34 teeth - my shortest relation is 22-34.
Is it possible to get a tripple chainring for Shimano group with less teeth? Would it improve my climbing ability being able to keep a faster cadence? Btw, I don't have any problem on asphalt and very seldom use the 44 teeth on the triple.

After a couple of hours we reached the waterfall and I thought the worst part was over. But it wasn't.
The abandoned railway path had many stretches covered with gravel and some rubbles. In spite of the small gradient I couldn't keep pedaling. With every little jump of the front wheel on the gravel/rubbles I'd loose traction and control and sometimes even my feet would jump out of the pedals.

The second "What can I do?":
I think there are a couple of things I could have done to improve the ride.
1 - reduce front tire pressure (I am running a Kenda Small Block Eight 26x1.95 with 65 psi). Would reducing tire pressure for example to 45 psi help anything?
2 - my front fork doesn't have suspension. Would a front suspension help or make things worse?
3 - I am afraid to clip my feet. But I believe a toe clip would have helped. Does it make sense?

When it was over I told the guys I really had a hard time on the gravel on the railway path. Then they said they also had, even with their MTB bikes. But I din't see anyone loosing control like me :(

This isn't a critic to the SR - I love the bike. And I also like riding offroad, so I just wonder what I can do to improve my SR offroad riding ability.
 

Charles.Plager

Recumbent Quant
I've got a Sofrider with a

I've got a Sofrider with a 48/38/22 triple and a 11-32 cassette, so very similar to what you have. I can ride up very steep grades (my computer has said over 20%) but I can't start on steep grades very well at all. And if it's wet (or sandy), I have even a harder time. In once case, my friend actually gave me a push and I was able to make it up the rest of the way.

I run much higher pressure tires than you do (I still have Maxxis Detonators that take up to 100 PSI and I usually pump them up to 95 or so). Lower pressure will give you more griI

I completely understand your fears about clipping in. But I do think it helps me climb as it does help me spin more smoothly. I have dual sided pedals, so if I don't want to clip in, I don't have to.

For starting on big hills, you might find that starting in a slightly higher gear makes it easier to not spin out and get started.

So, unfortunately after you've read all of this, you'll realize that I haven't really said much to help you out. Practice definitely helps and maybe finding a tire that grabs better. That being said, starting on sandy hills is going to be tough no matter what.

Sorry to not have any great insights for you here.

Cheers,
Charles
 

John Tolhurst

Zen MBB Master
@i009899
your three


@i009899
your three suggestions are right.

Tire pressure down to 40 or 45 would make a big improvement. What you suffered was the bike being thrown by every pebble from 10mm size upwards. A lower tire pressure and the pebbles press into the tire instead.

Front suspension would help.

Clipping in would help, loose setting and practise pullng your leg out and down in one motion for those emergency foot-downs.

If you can walk it at 5 kph, it doesn't matter if others can ride it at 4 kph.
 
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