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Caliper Brakes

From Bike Collectives Wiki

Revision as of 23:44, 7 January 2009 by Whizbo (talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Also known as side pull brakes, there are two types of caliper brakes.

Single Pivot - The simplest form - both brake arms pivot about a single bolt that usually attaches the unit to the frame as well. Single Pivot Calipers also "track" an out of true, and or mis-dished rim without issue.
Dual Pivot - Each arm has it's own independent pivot bolt, and the unit attaches to the bike with a separate bolt. These can provide more mechanical advantage then the Single Pivot Caliper Brake. However, Dual Pivot Calipers perform poorly in situations where there is a mis-dished wheel, or a wheel out of true.

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[localisation] LocalisationCache using store LCStoreCDB
[session] SessionBackend "lunnq825a2r2hv34p2batvs0b4kaclno" is unsaved, marking dirty in constructor
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[session] SessionBackend "lunnq825a2r2hv34p2batvs0b4kaclno" save: dataDirty=1 metaDirty=0 forcePersist=0
[DBQuery] Wikimedia\Rdbms\DatabaseMysqlBase::open [0s] database_staging: SET group_concat_max_len = 262144, `sql_mode` = ''
[DBReplication] Wikimedia\Rdbms\LBFactory::getChronologyProtector: request info { "IPAddress": "172.18.0.2", "UserAgent": "Mozilla\/5.0 AppleWebKit\/537.36 (KHTML, like Gecko; compatible; ClaudeBot\/1.0; +claudebot@anthropic.com)", "ChronologyProtection": false, "ChronologyPositionIndex": 0, "ChronologyClientId": false }
[DBReplication] ChronologyProtector using store APCUBagOStuff
[DBReplication] ChronologyProtector fetching positions for 00aba87f0d2b34d22fa7da60bd405aff
[DBReplication] Wikimedia\Rdbms\ChronologyProtector::applySessionReplicationPosition: DEFAULT (database_staging) has no position
[DBConnection] Wikimedia\Rdbms\LoadBalancer::lazyLoadReplicationPositions: executed chronology callback.
[DBConnection] Wikimedia\Rdbms\LoadBalancer::getLocalConnection: opened new connection for local/0
[DBQuery] Wikimedia\Rdbms\Database::beginIfImplied (MediaWiki\Revision\RevisionStore::fetchRevisionRowFromConds) [0s] database_staging: BEGIN
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[SQLBagOStuff] MainObjectStash using store ReplicatedBagOStuff
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[ContentHandler] Registered handler for wikitext: WikitextContentHandler
[DBConnection] Wikimedia\Rdbms\LoadBalancer::getLocalConnection: reused a connection for local/0
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ContextSource::getContext (MediaWiki\Skins\Vector\SkinVector22): called and $context is null. Using RequestContext::getMain()
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Unstubbing $wgLang on call of $wgLang::getDatePreferenceMigrationMap from Language->internalUserTimeAndDate
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[DBConnection] Wikimedia\Rdbms\LoadBalancer::getLocalConnection: reused a connection for local/0
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[DBConnection] Wikimedia\Rdbms\LoadBalancer::getLocalConnection: reused a connection for local/0
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[DBConnection] Wikimedia\Rdbms\LoadBalancer::getLocalConnection: reused a connection for local/0
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[DBConnection] Wikimedia\Rdbms\LoadBalancer::getLocalConnection: reused a connection for local/0
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[DBConnection] Wikimedia\Rdbms\LoadBalancer::getLocalConnection: reused a connection for local/0
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[DBQuery] MediaWiki::preOutputCommit [0s] database_staging: COMMIT
MediaWiki::preOutputCommit: primary transaction round committed
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MediaWiki::preOutputCommit: pre-send deferred updates completed
MediaWiki::preOutputCommit: session changes committed
[DBReplication] Wikimedia\Rdbms\ChronologyProtector::persistSessionReplicationPositions: no primary positions/timestamps to save
[DBReplication] Wikimedia\Rdbms\LBFactory::shutdown: finished ChronologyProtector shutdown
[DBReplication] LBFactory shutdown completed
OutputPage::haveCacheVaryCookies: no cache-varying cookies found
[DBConnection] Wikimedia\Rdbms\LoadBalancer::getLocalConnection: reused a connection for local/0
[DBQuery] Wikimedia\Rdbms\Database::beginIfImplied (LinkBatch::doQuery (for Skin::preloadExistence)) [0s] database_staging: BEGIN
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[DBConnection] Wikimedia\Rdbms\LoadBalancer::getLocalConnection: reused a connection for local/0
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See Also