View Single Post
  #8  
Old April 1st 18, 06:44 PM posted to rec.bicycles.tech
SMS
external usenet poster
 
Posts: 9,477
Default Help With Choosing 700c Inner Tube

On 4/1/2018 8:04 AM, Tim McNamara wrote:
On Sun, 1 Apr 2018 07:24:23 -0700 (PDT),
wrote:
x-posted from rec.bicycles.misc

This is the bike in question:

https://www.walmart.com/ip/Schwinn-A...-Bike/15711186

The tire size is 28" x 1 5/8" x 1 3/8" (37 - 622) 400 x 35c The flat
tube says 700 x 35/43c


So, tire sizing is a confusing mess because there are multiple labeling
standards across the world. The one to pay attention to is the one that
says 37-622; that is the international standard labeling and all current
tires and tubes are marked with that. 37 is the width in mm for the
tire, and 622 is the diameter of the tire bead in mm.

This is the silliest aspect of bikes, IMHO. It happened from bikes
being made to local standards in multiple countries, then international
trade happened.

27" and 622 are close enough that the tubes are interchageable.

Available to me at Walmart a

Bell Inner Tube Standard 27" Asos fits 700c 28 x 32c Fits tire width 1
1/8 - 1 1/4

------or

Bell inner Tube Presta 700c ROAD ONLY Fits tire width 25 - 32c


And the other issue: there are two commonly used types of valves for
bike tires. The Schrader valve looks like the one used on car tires.
The Presta valve is more or less specific to bikes. They are sized
differently- the hole in the rim for the Schrader valve is much larger
than that for the Presta valve. You do need to match the valve to the
rim.

Both of those tubes are are a little too skinny for that width of tire
to be ideal. They'll both work with the tire, once you have the valve
choice selected, but the tube will be stretched a little thin and more
vulnerable to more punctures. You want one in a range that includes 37
mm (say, "fits 35/43 mm").

Perhaps there is a local bike shop, which would have a better choice of
tubes?

Also, patching your existing tube could be an option. There are videos
on YouTube to walk you through it, if necessary. A patch kit costs
about what a tube does and will repair puncures in 6-8 inner tubes.
https://www.walmart.com/ip/Schwinn-A...-Bike/15711186

A couple of bucks more for a quality tube that's the proper size:
https://www.schwalbetires.com/tube_finder?term_node_tid_depth=246&246=on&field_t ube__etrto__value_many_to_one=622-37&field_tube_size_inch_value_many_to_one=All&fiel d_size_french_value_many_to_one=All&term_node_tid_ depth_1=272

https://www.ebay.com/itm/NEW-Schwalbe-AV-17-700-x-28-45c-Schrader-40mm/272699441727?epid=10014490669&hash=item3f7e27423f: g:iP8AAOSw~4taZ41X
Ads
 

Home - Home - Home - Home - Home