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Downsizing tyres.

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recman
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PostPosted: 16:21 - 19 Feb 2018    Post subject: Downsizing tyres. Reply with quote

I'm looking to swap out my Kenda knobblies for some narrower road going Shwalbe Marathon.
The Kendas are 42 but the Shwalbe will be 32, will my tubes be ok?
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stinkwheel
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PostPosted: 17:20 - 19 Feb 2018    Post subject: Reply with quote

Depends which tube is in there, they tend to cover a range of sizes. As with most things bicycle, there isn't any real standardisation so it depends if the ones you have are towards the top or bottom of the range that particular brand covers. It may or may not say on them.

If you can stuff them in there, they should be ok. If there's all bits hanging out the sides, you probably need smaller ones.
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I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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recman
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PostPosted: 17:23 - 19 Feb 2018    Post subject: Reply with quote

I shall suck it and see. Thumbs Up
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Ste
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PostPosted: 18:13 - 19 Feb 2018    Post subject: Reply with quote

They'll be fine.

Probably. Laughing
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recman
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PostPosted: 23:27 - 19 Feb 2018    Post subject: Reply with quote

Cycling spill counter thread incoming.
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stinkwheel
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PostPosted: 15:22 - 20 Feb 2018    Post subject: Reply with quote

recman wrote:
Cycling spill counter thread incoming.


Broke your fingers??

C'mon, spill the beans. Surely didn't run out of grip on a pair of Marathons?
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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recman
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PostPosted: 17:14 - 22 Feb 2018    Post subject: Reply with quote

No no, it's just the reassurance from Ste makes me pre-empt disaster.
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recman
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PostPosted: 15:17 - 23 Feb 2018    Post subject: Reply with quote

Fitted new rubber earlier, it's beginning to look a bit swish.
I've not ridden on them yet bit I can imagine I'll be a tad quicker.
https://s13.postimg.org/so2x8udvb/20180223_123533.jpg
https://s13.postimg.org/8tgvmqe3b/20180223_123543.jpg
https://s13.postimg.org/de321x5l3/20180223_130006.jpg


Last edited by recman on 15:25 - 23 Feb 2018; edited 1 time in total
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stinkwheel
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PostPosted: 15:20 - 23 Feb 2018    Post subject: Reply with quote

In B4 "needs bigger chainring.".
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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recman
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PostPosted: 15:24 - 23 Feb 2018    Post subject: Reply with quote

stinkwheel wrote:
In B4 "needs bigger chainring.".


Don't leave me hanging.
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stinkwheel
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PostPosted: 16:51 - 23 Feb 2018    Post subject: Reply with quote

recman wrote:
stinkwheel wrote:
In B4 "needs bigger chainring.".


Don't leave me hanging.


Literally, I reckon you'll start spinning out on it in top gear and need a bigger chainring. Remember the rules. It only gets faster, not easier.

The lower rolling resistance notwithstanding, your lower profile tyres have just reduced the effective wheel diameter by a fair bit so it'll not only be easier to pedal, it'l also be slightly lower geared.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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recman
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PostPosted: 20:11 - 23 Feb 2018    Post subject: Reply with quote

Ah ok. Makes sense.
My Mrs is gonna love the extra expense.

Tbh, I haven't really used the biggest front cog yet.
My usual route is quite short and the middle cog has been sufficient so far.
I don't really get the chance to get any serious speed up.

I will update on my findings in due course.
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recman
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PostPosted: 15:32 - 24 Feb 2018    Post subject: Reply with quote

Went for a spin on my usual route, the fastest section was just under 5mph faster with the new tyres and that was with a bit of a headwind.
I hadn't been out for a while so my overall time wasn't my fastest.
And yes, I got on the big cog.
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thx1138
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PostPosted: 21:31 - 26 Feb 2018    Post subject: Reply with quote

I've got "Terrainasaurus" tyres on my hybrid, not sure they make them anymore.

Basically look like this;
https://www.wtb.com/products/all-terrain

debating switching the tyres, though not sure how much difference it will make, I mean my average speed might go up, but the effort I put in through the pedals probably won't change, would it?

Also, I do ride on some pretty crappy cycle paths, and gravel tracks from time to time.
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stinkwheel
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PostPosted: 10:52 - 27 Feb 2018    Post subject: Reply with quote

My wife rode a fixie with Michelin city tyres and moustache handlebars round the perimeter road of Keilder Water.

As long as you're not in actual deep mud, normal road tyres are perfectly fine. No problems on gravel tracks and crappy cycle paths.

The Schwalbe Marathons recman has on are what you'll find on every round the world/pan-American/long distance bike.

Those are the two I like for general purpose bicycles. Schwalbe Marathon for preferrence (not cheap) or Michelin City for cheapness. Both are pretty puncture resistant too. The marathons more-so.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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Ste
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PostPosted: 14:43 - 27 Feb 2018    Post subject: Reply with quote

stinkwheel wrote:
Both are pretty puncture resistant too. The marathons more-so.

Useless fact of the day: Boris bikes used to use Schwalbe Marathon tyres.

I say used to use, I don't know if they still are.
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